Malicious PDF — malware analysis report

Static analysis result for SHA-256 251de1b4c8fa0508…

MALICIOUS

PDF

41.8 KB Created: 2020-08-16 13:10:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: af968b6a776c8534b834b2d4e5c3ebbb SHA-1: 7b1e7aafbf924e7b75b01990ac96727a3572247d SHA-256: 251de1b4c8fa0508a8ec50da5829e25b144b9f3686adacebeafffae10fdc483b
162 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=movies++bollywood+2015, which is likely used to redirect users to a harmful destination. The document body contains garbled text but also includes the same URLs, reinforcing their presence within the file's 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.
  • 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=movies++bollywood+2015 In PDF document text
    • http://files.evolotionbody.com/uploads/1/3/0/7/130738933/mavisizeralita_zugedut.pdfIn PDF document text
    • http://rezularak.nouvellegraphicdesign.com/uploads/1/3/1/1/131164110/mudigol-popetop.pdfIn PDF document text
    • http://files.frictiongloves.com/uploads/1/3/0/9/130969944/tepujelegu.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/1/0441/2506/1272/files/bharti_axa_term_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lawup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/76339460350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/talk_about_yourself_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8558/4802/files/duxatubuvimus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3537/5254/files/kolmogorov_probability_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9662/7618/files/53460327127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1390/6333/files/kakipiterafewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0775/1838/files/roosa_master_injection_pump_schematic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/pizza_max_biella.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0105/2323/files/careers_in_computer_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6523/6886/files/vemupepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7117/5846/files/baixar_leitor_de_apk_para_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/vadajixotunimotunolizo.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 3

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_off000065ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BA 5360 bytes
SHA-256: c4f7962e2691758649e09d4b37558a884d5c1e9b6e8e951938d9c097b0b35de7
font_01_sfnt_off00007837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7837 9968 bytes
SHA-256: 1bd01a4478d1e5c5ad3abc256b5d08ad16ad59ed85e4f95a6bfacfd87762c169

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