Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a204681e5fc2ff0…

MALICIOUS

PDF

40.1 KB Created: 2020-08-27 14:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dbb068a68b73608e4e42f1a78f7011e9 SHA-1: ca3f88e7a7752c0468ed1778c7315c459bd7fafe SHA-256: 8a204681e5fc2ff04fba152cb324fec012a38ae989b99926e87ecb55587676f1
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, https://ttraff.com/pify?keyword=guitar+lessons+for+beginners+pdf, disguised as a document about guitar lessons. This indicates a social engineering lure to redirect users to potentially harmful content. 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=guitar+lessons+for+beginners+pdf In PDF document text
    • http://files.veinclinicmb.com/uploads/1/3/0/8/130874317/ripajevofuw.pdfIn PDF document text
    • http://files.paterpaulus.us/uploads/1/3/2/7/132711947/2377049.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/1/0437/7886/7351/files/53718557478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/tapowepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/3454753207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2536/6165/files/logos_quiz_gouci_answers_level_14.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6686/7362/files/baka_tsuki_to_aru_majutsu_no_index_new_testament.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0750/0711/files/91538516742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7728/8611/files/certificate_of_work_experience.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/9697/9864/files/rumeli_ekrem_ayana_pembe_alvar_giyer_mp3_indir_dur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0173/3542/files/food_handlers_license_nyc.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
🗂 Part of campaign: paterpaulus.us 4 samples

Related samples 8

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_off00005f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F17 5380 bytes
SHA-256: 61994c7bbd32c659583281cfff0a36a8bb4a261c432b64c5efc87a17742ae0b4
font_01_sfnt_off00007171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7171 10160 bytes
SHA-256: 0ed11df0fc57a177b363fcedc2df7fd73c820ec766eb13b107d9c81b7a0b76ab

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