Malicious PDF — malware analysis report

Static analysis result for SHA-256 864819bf331a346d…

MALICIOUS

PDF

44.9 KB Created: 2020-08-05 05:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 570074739b2cd48f972032ae8a0af57e SHA-1: 01c8cd9d5c37eb1d46432dbd623293b153ed19a0 SHA-256: 864819bf331a346db878bde95aea5ddddfc9b32d7b85b261adaeed5b31deee71
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are SEO-optimized PDFs hosted on Shopify. A primary link redirects through `ttraff.ru`, a known malicious redirector, to a page offering a free PDF download. This indicates a phishing or scam attempt designed to lead users to malicious infrastructure. No scripts were extracted, but the extensive link farm and redirector usage strongly suggest a 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.ru/pify?keyword=satyanarayana+biochemistry+free+pdf+download In PDF document text
    • http://files.waltonbarrowboardofrealtors.com/uploads/1/3/2/6/132681356/xexabetozef-sedelufi-kidogabavaxef-wapokut.pdfIn PDF document text
    • http://files.alldogstoronto.com/uploads/1/3/0/8/130874394/tefow_vopuwipeb_degufuxedopu_fukebividek.pdfIn PDF document text
    • http://xagik.newfrousy.org/uploads/1/3/1/1/131163658/1692984.pdfIn PDF document text
    • http://files.harrisondomain.org/uploads/1/3/1/3/131380875/1555419.pdfIn PDF document text
    • http://files.hypnobabieswithlauren.com/uploads/1/3/1/1/131163853/zijonureposi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/1177716733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0542/5310/files/43613637804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/kemagufibolimobibolameg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7013/6218/files/91827287190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/44695083103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8070/4405/files/cathode_ray_oscilloscope_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9373/7110/files/50515071581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8601/8712/files/30792218791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/nedex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1005/6615/files/61502875924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/bobopigitafebige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/uf_admissions_office.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5073/6533/files/2015_international_building_code_study_companion.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E9 5620 bytes
SHA-256: 85132ac11229b1f841e04a06e99da56d9ad9a81dc8d930d259354f9541231a57
font_01_sfnt_off000075dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75DD 9988 bytes
SHA-256: d6844f56f9d2e21864322f5bf3b175688a01106a8e3ebe6ffdf05c24edfa05c5
font_02_sfnt_off00009809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9809 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333