Malicious PDF — malware analysis report

Static analysis result for SHA-256 151476e852be3569…

MALICIOUS

PDF

47.5 KB Created: 2020-08-05 22:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a4622bce353d88db34602e4c55a0ef9c SHA-1: 7205e74c1c0e87342ae1613adb4152644fc52033 SHA-256: 151476e852be356914a3fa2e986d58c368fb781e69e130093f1ec1219b595354
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to a redirector service, indicating a link farm or phishing lure. The document body and embedded links explicitly mention 'Approximation questions for ibps po 2020 pdf', suggesting a lure for exam preparation materials. The primary redirector URL is associated with malicious activity, and the ML classifier strongly flagged this PDF as malicious. The presence of embedded JavaScript, though not fully analyzed, suggests potential for further exploitation.

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=approximation+questions+for+ibps+po+2020+pdf In PDF document text
    • http://files.hannahbettsphotography.com/uploads/1/3/0/7/130739116/b3a6ff71.pdfIn PDF document text
    • http://files.maisonmiroir.com/uploads/1/3/1/4/131437766/kupivitunabemo.pdfIn PDF document text
    • http://files.raserabwehr.de/uploads/1/3/0/9/130969879/621d8af8ceac1.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/1/0434/0265/7957/files/vim_replace_with_new_line.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0389/6217/files/faditepigematok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5242/5631/files/91977516702.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/radiwaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8308/8547/files/xitafavajizuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6368/0932/files/xukelub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/almidon_en_coprologico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/konajenepurevevarozat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1574/0314/files/gatule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/40526734820.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0932/5730/files/rezewupowugedagajaderawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/mimukixofixajulodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/oscar_peterson_hallelujah_time.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6403 5632 bytes
SHA-256: 095464465ba3d8fc2ca1549031d1a51d73508195fb3a183b89f2db6a68f6a484
font_01_sfnt_off000076fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76FC 1728 bytes
SHA-256: 8a7fef30536efc43730865987e3b75d47a259a08003b22921e980fc4baa691d2
font_02_sfnt_off00007f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F97 10108 bytes
SHA-256: cd7b1cba73983a3890e079f71c5be643185271c4a5a6515a9cf99db7d89fe6b6
font_03_sfnt_off0000a1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1DC 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34