Malicious PDF — malware analysis report

Static analysis result for SHA-256 f900786e95aeb14b…

MALICIOUS

PDF

37.5 KB Created: 2020-08-06 21:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2e1f11bb91cc37431002a2440e2f7762 SHA-1: db20c47068b8258630cf4cddd83fd7c8cd72864f SHA-256: f900786e95aeb14b805abd54f70529d2f9e2c4f03dfcdfbffbe8a7df1bc10298
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass of external links, many of which point to a redirector infrastructure designed to host SEO-optimized lures. The primary lure observed is a fake offer for 'Adobe pdf reader for android apk', redirecting to 'https://ttraff.cc/pify?keyword=adobe+pdf+reader+for+android+apk'. This suggests the document is part of a phishing campaign aiming to trick users into downloading malware or visiting malicious sites. No scripts were extracted, but the embedded URLs and link farm structure are strong indicators of malicious intent.

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=adobe+pdf+reader+for+android+apk In PDF document text
    • http://gijub.legacycaengineering.com/uploads/1/3/2/8/132816066/tejukidoteko-kadopopoli-tudulirapub.pdfIn PDF document text
    • http://files.asifthinkingmatters.com/uploads/1/3/1/3/131378990/mirovos_rubiru_raburabuzofapo.pdfIn PDF document text
    • http://files.integralsteps.org/uploads/1/3/1/3/131379042/1005e6295911.pdfIn PDF document text
    • http://files.democraticclubofthewoodlands.com/uploads/1/3/0/7/130740563/0d32fc94.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/1/0433/0687/7080/files/41230052817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9603/8812/files/kugunonogusepufivugul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9305/5904/files/final_fantasy_viii_rom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8328/2070/files/academic_dishonesty_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/xagubalojebuzatubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4227/4471/files/landscaping_contract_agreement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60561448525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5470/2496/files/assistant_accountant_job_description_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/43991658506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/degejuwetisagemudow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8460/1752/files/96060663187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3980/7893/files/bribery_and_corruption_policy.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_off000055f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55F7 5016 bytes
SHA-256: 1d432781abfbbe47ca8307755f4fba3d5bad591b712583c9e37585b9ea9ec459
font_01_sfnt_off00006716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6716 9980 bytes
SHA-256: daf374bd42ccc0e1a4bf98152a9539367da6ce6ac66f6a0329835a80b215137e