Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff7a00bb66e9dc41…

MALICIOUS

PDF

44.0 KB Created: 2020-08-21 10:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2ecfbe3e80a33305c96c978e6363c294 SHA-1: 6f292c8e2857a56b7a43ea284046cabefec81f89 SHA-256: ff7a00bb66e9dc41661939d436c9a3f5bb44f2c17f36b1b5abbdd35be55cb5b3
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Adguard 2.12 250 premium apk' and a URL that appears to be a lure for downloading this software. This suggests a phishing or scam attempt where the user is tricked into clicking the malicious link under the guise of obtaining the advertised software. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=adguard+2.+12+250+premium+apk In PDF document text
    • http://files.bakerskidscrafts.com/uploads/1/3/1/3/131383924/gepavalufo-tubupokeb-sogegafelogen.pdfIn PDF document text
    • http://vijawenez.supercollectorcatalog.com/uploads/1/3/2/8/132814930/sames-govazijo-minifet.pdfIn PDF document text
    • http://files.berkshire-epc.co.uk/uploads/1/3/2/6/132681783/mososadonegukovalu.pdfIn PDF document text
    • http://files.investphilippinesindia.org/uploads/1/3/2/7/132712093/3d19e6574.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/1/0432/1941/9291/files/cbse_result_2015_class_10_marksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/noburuxobutibawurifejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4667/4336/files/fundamentals_of_engineering_economics_second_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0216/5410/files/bujapisuzabikurat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5291/6119/files/plz_karte_baden_wrttemberg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5503/0170/files/jalojemideli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5397/9550/files/medical_cases_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/terasiwolanopivepo.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_off00006c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C37 5604 bytes
SHA-256: 4117c19caa0a9e75bb2ce88972c3b788192c8e251e16ecdca39cb98bf122edb9
font_01_sfnt_off00007f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F42 10660 bytes
SHA-256: 278d8e59287906353b227c811fc52d981e418838cf62643f2ac483162d8aba82

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