Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bcfc5a8e87f49fe…

MALICIOUS

PDF

43.7 KB Created: 2020-08-05 03:36:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2ca61ba15388289776e9fbbcb5578a1c SHA-1: 3f0d4aa28d4db5d9b8008e234f6f483bea74cd7c SHA-256: 0bcfc5a8e87f49fe4da8dba6fbf4db93541f8ec19e9ce363c5222f6d5f10286b
194 Risk Score

Malware Insights

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

The PDF contains a link disguised as relevant content ('Articulaciones del hombro pdf') that redirects to a malicious URL, ttraff.ru. This is further supported by heuristics indicating a malicious redirector and a link farm designed for SEO manipulation. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

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=articulaciones+del+hombro+pdf In PDF document text
    • http://files.dominionwineandbeerstore.com/uploads/1/3/1/6/131637148/cba3a481b.pdfIn PDF document text
    • http://files.ngatipaoaiwi.co.nz/uploads/1/3/1/3/131380467/tedolajonur.pdfIn PDF document text
    • http://files.conniesclassictouch.com/uploads/1/3/0/9/130969506/28589.pdfIn PDF document text
    • http://files.lwemporium.com/uploads/1/3/1/4/131437283/2400889.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/1/0437/8374/9781/files/stoger_condor_supreme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/84347829108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4659/8816/files/54048821824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6885/9303/files/72259071133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0645/2131/files/home_bethel_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/antropologia_cultural.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8032/6051/files/22136738662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4162/0119/files/tableau_priodique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3515/2804/files/coca_cola_mission_statement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/jenusaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5079/3110/files/90633772701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6421/4175/files/79356286110.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: ngatipaoaiwi.co.nz 3 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA9 5408 bytes
SHA-256: e54610e953095984af13d5c357a997b4c342c13ae41589b3f1d7f0c0f39d592e
font_01_sfnt_off00006fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCC 10552 bytes
SHA-256: bbaac3d5fc898fbab2ac3fc97456704258975aee450ecf68570a45a525bcc94b
font_02_sfnt_off00009232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9232 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f