Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4f3f2d92f60350…

MALICIOUS

PDF

54.5 KB Created: 2020-08-21 14:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 94c9362fbb81da99ab2d22b6bbe12f70 SHA-1: 68df8c0e82697ddaedbbf938750e17797c83d0df SHA-256: fb4f3f2d92f603500da9378adf1f4fbeb52b6a1050ed1ba991c7c1e69057b577
202 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, `https://ttraff.ru/pify?keyword=accident+reporting+centre+ntuc`, is identified as a malicious redirector. The document body, though partially corrupted, contains text related to an "accident reporting centre" and mentions urgency, aligning with social engineering lures. The presence of numerous external PDF links suggests an attempt to manipulate search engine results or distribute further malicious content.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ru/pify?keyword=accident+reporting+centre+ntuc In PDF document text
    • http://direv.adoptelf.com/uploads/1/3/1/3/131381130/5195983.pdfIn PDF document text
    • http://vafino.energysmartacademy.com/uploads/1/3/1/6/131606289/5367324.pdfIn PDF document text
    • http://xilefutug.anxiousandalive.com/uploads/1/3/1/3/131379698/bupokaz.pdfIn PDF document text
    • http://files.adcoblue.com/uploads/1/3/1/3/131398475/7ef5440e3830d.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/1/0435/1174/2628/files/lorazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5719/8742/files/hamlet_monologue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6249/3345/files/95169597278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/40837738923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3761/3461/files/lizarukoxuzajegutanan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1730/4226/files/bevavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5679/8615/files/badolunirefukomanaropovik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7248/6566/files/wii_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/application_android_camscanner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/situmapilik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3656/5923/files/dugitoragubakuwirup.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
🗂 Part of campaign: adcoblue.com 6 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD1 4808 bytes
SHA-256: bd74a3b62a7c7d0fd5e868aebe85608fc9ded842fa4abbd7bb44f9f3b682d4fd
font_01_sfnt_off00009d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D36 15524 bytes
SHA-256: 4bd2b7b47b8103423eaadce8182f6108d7cea951551ed04b2690eb2af6c92cbc