Malicious PDF — malware analysis report

Static analysis result for SHA-256 625871bece06b901…

MALICIOUS

PDF

37.0 KB Created: 2020-08-12 13:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 755ad2dd24625f664cfab55c428ff6d4 SHA-1: 7a8286148e01a9f1638cc2aaef9ecbdbfd230db4 SHA-256: 625871bece06b9017cc2f52a0f8ab68dc923c8bd3f7cc5decf98a26eca64e5f1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to a redirector service. The primary URL identified, 'https://ttraff.ru/pify?keyword=bukhari+hadees+in+tamil+pdf+free+download', is flagged as malicious. This suggests the document is part of a link farm or SEO spam campaign designed to drive traffic to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=bukhari+hadees+in+tamil+pdf+free+download
    • http://files.quikbild-international.com/uploads/1/3/0/9/130970004/pavokefapovup.pdf
    • http://files.jingleexpert.com/uploads/1/3/0/7/130776493/879dda94.pdf
    • http://files.thrivingage.com/uploads/1/3/1/4/131438582/4176555.pdf
    • http://files.appraisalprogroup.com/uploads/1/3/1/4/131437158/jenomibebinajegap.pdf
    • http://files.highlanderfootball.com/uploads/1/3/1/3/131379894/doworeronazodaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6786/6265/files/85924388427.pdf
    • https://cdn.shopify.com/s/files/1/0451/3444/6746/files/ocean_of._net.pdf
    • https://cdn.shopify.com/s/files/1/0436/1761/6034/files/36096859779.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81858120772.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/57831712470.pdf
    • https://cdn.shopify.com/s/files/1/0430/7809/0901/files/71101946097.pdf
    • https://cdn.shopify.com/s/files/1/0431/9097/6673/files/accp_chest_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0448/8495/1207/files/gufipew.pdf
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/40154262292.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9834/files/13528839089.pdf
    • https://cdn.shopify.com/s/files/1/0437/5475/0106/files/98826398879.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005143.bin
ee04414a23742c8bc644bbfef9e0a613b82b90d66860d8f290632b376a67712e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5143 5484 bytes
font_01_sfnt_off000063d1.bin
3e6ca3054b02caceaabb9bd3c1de000c2543f0baca1a2a9328c8ac5bc1b4db25
pdf-font-stream PDF embedded font (sfnt) at offset 0x63D1 10348 bytes