Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d877a1954322d34…

MALICIOUS

PDF

45.3 KB Created: 2020-07-28 16:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 76ce8f1a56b2d51a1977c5cef39e933c SHA-1: 3d59883e4b419c53bc1c30cb2500d08348238602 SHA-256: 5d877a1954322d343cd3c2b65f0a2f899a3a41bc7c0c0c92bbe75e92a8d46d61
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure related to 'Battlefield 3 free pc' and impersonates Amazon, directing users to a suspicious URL (https://ttraff.ru/pify?keyword=battlefield+3++free+pc). This URL is flagged as a malicious redirector and is part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier strongly supports the malicious verdict.

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://ttraff.ru/pify?keyword=battlefield+3++free+pc.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=battlefield+3++free+pc In PDF document text
    • http://files.weecansign.com/uploads/1/3/2/7/132740814/xififir-wufabebasezuw.pdfIn PDF document text
    • http://files.pongdeelab.org/uploads/1/3/0/8/130813639/7832761.pdfIn PDF document text
    • http://files.lucymortonmusic.com/uploads/1/3/0/7/130739991/zusupepe.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/1/0432/3088/8094/files/finudet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/99388984165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0925/9158/files/kozisoxomipagado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/33623103731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6780/1749/files/nuzevav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6308/3170/files/43109260864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/nexukumegujizogidim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0605/7883/files/53531785786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8131/8056/files/vevum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/35981591088.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 4

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_off0000757a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x757A 4756 bytes
SHA-256: 1d803e2bdef1d97a640c9a4c8be998023f17eef68bcf90ff32b507732cddf411
font_01_sfnt_off000085b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B2 10228 bytes
SHA-256: 931ddbc0099496316eea083575359189e14742276b387fc2709265fec4d65066

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