Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1b6844d78ac03cf…

MALICIOUS

PDF

42.0 KB Created: 2020-08-07 19:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 70d8add923a29436653182656a9521be SHA-1: b665aa5424237dbb88bd86c16e27483ea4ad4fac SHA-256: a1b6844d78ac03cf340bea1b694abb17dd16c9697926a7f3ba5852d850a09634
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a link farm designed to appear as search results for a technical manual, but the primary link redirects to a known malicious domain. This indicates a phishing or scam attempt. The document body itself is heavily obfuscated but contains the malicious URL and numerous benign-looking PDF links hosted on Shopify, likely to lend legitimacy to the overall lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.com/wb?keyword=fluke%205500a%20calibrator%20manual In PDF document text
    • http://files.assisted-living-resources.com/uploads/1/3/2/8/132814942/luduvevimam.pdfIn PDF document text
    • http://radagew.thomasstreetpharmacy.com/uploads/1/3/1/0/131070161/kitatabubigerubuju.pdfIn PDF document text
    • http://files.whitegallowaysofwayby.com/uploads/1/3/0/8/130873907/fewubogukobavel-sixomolimu-mifip.pdfIn PDF document text
    • http://files.onebookonelife.com/uploads/1/3/0/7/130775992/ff50756ea81784.pdfIn PDF document text
    • http://files.refugees-hist-366.org/uploads/1/3/2/7/132710491/3496221.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/1/0429/6900/6236/files/92509655153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/39861341667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1641/files/nabidawodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6993/1673/files/2540814988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2190/9667/files/81966998856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/21780448627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/php_case_statement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/wupogofemamevimeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1060/5735/files/serenevutumujutogavuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4575/6833/files/77570706862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7655/8746/files/guxili.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_off00006419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6419 5192 bytes
SHA-256: 481942224d962773352d48ef92acc0bc5b7b0e30090558250c15b63e59b0c51d
font_01_sfnt_off000075b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75B6 10764 bytes
SHA-256: 1bde1a22c907727ffa50cbbd34572df81d087e77955dc97f355d028ea6fb3a0b

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