Malicious PDF — malware analysis report

Static analysis result for SHA-256 4921f77d3b758b67…

MALICIOUS

PDF

60.2 KB Created: 2020-08-11 09:35:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a73dbd6d20af92536361e1a8f1df2902 SHA-1: 64b10f160f3a5636182909c825ff33b9791a1260 SHA-256: 4921f77d3b758b67116e48ca4bc00c628a77116144164732ddb725e9f8cdb075
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. The primary malicious link, 'https://ttraff.cc/pify?keyword=100+carols+for+choirs+pdf+download', is a known malicious redirector. The document body, though heavily obfuscated, contains this malicious URL, suggesting the document's purpose is to redirect users to malicious content.

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.cc/pify?keyword=100+carols+for+choirs+pdf+download In PDF document text
    • http://files.theshirehomestead.com/uploads/1/3/0/7/130776460/8237623.pdfIn PDF document text
    • http://files.mansfieldvineyard.org/uploads/1/3/0/7/130740231/f9cdfe7.pdfIn PDF document text
    • http://files.steveneillsgarage.com/uploads/1/3/0/8/130874123/6e8a6d2184c3eb2.pdfIn PDF document text
    • http://files.greenshoe.org/uploads/1/3/0/8/130813616/4178623.pdfIn PDF document text
    • http://files.itascasports.com/uploads/1/3/1/4/131437484/mojixe.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/1/0434/7399/3890/files/5957595816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/godavevibiwuvozix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0671/4268/files/geometry_final_exam_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73930450062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/colloquial_egyptian_arabic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8080/0674/files/biwemabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/xegebalowugon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/aadhar_card_update_form_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/automatic_door_opening_system_using_arduino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/sobazonumafarewaxagul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9971/6770/files/morevipotexizukukivaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/gufogovor.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D54 4756 bytes
SHA-256: da3038f8d6b00bb4f075c615454522c37c590faa2ea3fbed1b45f97a0ebc99e5
font_01_sfnt_off0000adac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADAC 5432 bytes
SHA-256: d51e31d5d48575cf39925f8e1127802ce2a28303332f347b418bad9a1b326fca
font_02_sfnt_off0000c024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC024 10200 bytes
SHA-256: 6572436f95097ecbaabe34936d5c75cf8a8ddd0d7bc9d0cf05e6f0699c8f3e8d