Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e783bfee1ebd91…

MALICIOUS

PDF

66.8 KB Created: 2020-08-24 09:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2cff4eb56492cfdaa0312588ec7fbd05 SHA-1: a57bdbd06d8e61e4b61e389ccfd0932ae63cb469 SHA-256: a5e783bfee1ebd91ea76b0f7b5d9ccf53b013e26004b836aba786f821fce0341
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=bootstrap+4+contact+form+with+validation+example'. Additionally, another critical heuristic indicates a PDF link farm, with many links hosted on shopify.com, though most appear benign. The ML classifier also strongly flagged this PDF as malicious. The document body contains the malicious URL, suggesting a lure to a phishing or malware distribution site.

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.ru/pify?keyword=bootstrap+4+contact+form+with+validation+example In PDF document text
    • http://zemik.gamers-news.net/uploads/1/3/0/8/130814328/9704612.pdfIn PDF document text
    • http://files.centraljerseydyslexialearning.com/uploads/1/3/0/7/130740571/porunulegatapeji.pdfIn PDF document text
    • http://files.jakobshockey.com/uploads/1/3/1/6/131606502/jujivisesuni.pdfIn PDF document text
    • http://gidewabo.lsrbooksltd.com/uploads/1/3/0/7/130775047/timotisabogi-gakagevejajik.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/1/0439/1511/6696/files/bioremediation_files.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/hackintosh_mojave_nvidia_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/dewonojoneg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2744/8476/files/presente_simple_y_continuo_en_ingles_ejercicios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3740/8936/files/suvaxadelipuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5780/6486/files/lawalunizelag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7258/5888/files/lusapafodikesudatuwagad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9720/9498/files/jifefimovudave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/92602770963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3524/5216/files/soxijibujuzekotumowofekon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0898/1153/files/79722617227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6785/8334/files/2773699716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4813/2008/files/88023838081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9827/4978/files/79655650758.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB246 5752 bytes
SHA-256: 106a54de1624999073783008f52bfba9404dca5b285dd9a0d32c5ef2d1504b38
font_01_sfnt_off0000c5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5CB 17280 bytes
SHA-256: 5d7f1bb93ced00d9dcc58b4fe83f6e84ae262005a72c4d4d6773cb0f669198b7