Malicious PDF — malware analysis report

Static analysis result for SHA-256 af31d397709a9535…

MALICIOUS

PDF

61.9 KB Created: 2020-07-20 11:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6b73a52f38f5f0f79f27468390f1f874 SHA-1: 3d405572f8f850a866910e0db3e3f263f8090b2c SHA-256: af31d397709a9535a1eb912bad52f136179492efca758e5464b9961b2700406b
234 Risk Score

Malware Insights

MITRE ATT&CK
T1200 Hardware Add-in T1059 Command and Scripting Interpreter T1566 Phishing

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain keywords related to 'cydia apk iphone 5', suggesting a lure for potentially malicious software. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document may also instruct the user to execute commands, further increasing the risk.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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
  • 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=cydia+apk+iphone+5 In PDF document text
    • http://files.robinsonauctionservice.com/uploads/1/3/1/0/131070216/1e469d167d3a47d.pdfIn PDF document text
    • http://files.gobigt.com/uploads/1/3/0/7/130775978/cddb4.pdfIn PDF document text
    • http://files.darkhorsespirit.com/uploads/1/3/0/9/130968961/6f0af.pdfIn PDF document text
    • http://files.dancestudiesuoft.ca/uploads/1/3/0/7/130775102/vozidowoviketuwa.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/1/0427/7728/0671/files/52733817477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6580/2903/files/91861273731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/52681330903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1674/8190/files/livodomomutepegewaxur.pdfIn PDF document text
    • https://zodizijemas.files.wordpress.com/2020/07/66665986191.pdfIn PDF document text
    • https://fofawogo.files.wordpress.com/2020/07/nidabib.pdfIn PDF document text
    • https://nivosere.files.wordpress.com/2020/07/44741790827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8011835234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0926/1218/files/midobub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/19345844843.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/97139899393.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/kazuvodakitolo.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_off0000b71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB71F 4764 bytes
SHA-256: b909eb878a644b4cae117d4904106c8a9059ade84a4679d34dc6bdfb467a5ba2
font_01_sfnt_off0000c74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC74F 10280 bytes
SHA-256: 9dc5c4b7cdaf251f304f3649c513a7fc771419101da0fb56e66dcc01482fdbe6

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