Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf4e55871d37184…

MALICIOUS

PDF

53.6 KB Created: 2020-07-27 15:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 560b0d6d33e9f8acccb195c70c78c15b SHA-1: 3bad428d48af8467f67fa12fbf4a8dc93885e982 SHA-256: 1cf4e55871d37184d9b5da642f8f8a9b8ccfe9ea99ca49612565ca08567bc45e
274 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.003 Windows Command Shell T1059.001 PowerShell

The PDF contains a malicious redirector link, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. It also features a link farm, suggesting SEO poisoning tactics. The document body, though heavily obfuscated, contains text related to 'Google sheets api php tutorial', likely a lure. The heuristics indicate the document attempts to trick the user into executing commands or providing MFA codes, consistent with phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=google+sheets+api+php+tutorial In PDF document text
    • http://files.cropwalkforsyth.org/uploads/1/3/1/0/131069819/nugozesavojuvat-kosofa-vavamuv.pdfIn PDF document text
    • http://files.andylamont.com.au/uploads/1/3/2/6/132696263/5026528.pdfIn PDF document text
    • http://files.thesaltandlightacademy.com/uploads/1/3/0/8/130814229/7120781.pdfIn PDF document text
    • http://files.henrikbechseeberg.com/uploads/1/3/1/1/131163578/supaj-rutubiforol.pdfIn PDF document text
    • http://files.theprincesscryaries.com/uploads/1/3/0/9/130969710/4700470.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/14067123391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7052/0470/files/44717180913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jatud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84302935330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vinujavezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/27102204993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3608/0285/files/90039211892.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1653/5720/files/biribexobibesinewobikox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/82030439235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1560/2339/files/mutum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/bosivitugadifiruvegim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0003/5485/files/soseguv.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8593 4888 bytes
SHA-256: 85f96eb7853b67e5970b192067a4a33f9b5009a8e606a62f0d2084b520ebfc93
font_01_sfnt_off00009657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9657 16356 bytes
SHA-256: 0cd7502993ff2eb1e27a4de22ccef01011929fbd72399c2cb24a9e3e6177b408

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