Malicious PDF — malware analysis report

Static analysis result for SHA-256 60bf472c8aa351bd…

MALICIOUS

PDF

42.6 KB Created: 2020-08-03 16:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f507f0063fe32676b3530800f60f61fe SHA-1: 8e9f0f893dd9d6af8b37d779a884d0ada81d7d9b SHA-256: 60bf472c8aa351bd1151e966a8696eff14dc111d67f4825a50ef45c7f502bbe5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also flagged this PDF as malicious. The embedded links likely serve to direct users to malicious websites, potentially for phishing or to distribute further malware.

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=audyt+bezpiecze%25C5%2584stwa+informacji+pdf
    • http://files.divinesoulenergy.com/uploads/1/3/0/9/130969819/d55ccdadbe3c.pdf
    • http://files.absintheaccessories.org/uploads/1/3/1/6/131637226/satum.pdf
    • http://files.crumistuff.com/uploads/1/3/1/3/131381078/voxugajotef-nafulepufu.pdf
    • http://files.jackandwinn.com/uploads/1/3/2/8/132815175/luwosudivokidux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2784/0669/files/pedawimeropepanupirato.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/xowipuxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6636/files/dedalawawo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/4630896247.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4823/files/58463550248.pdf
    • https://cdn.shopify.com/s/files/1/0438/9843/7784/files/74370046039.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7203/files/fiwadegitivatamako.pdf
    • https://cdn.shopify.com/s/files/1/0431/1908/3677/files/dulukomekutekegudase.pdf
    • https://cdn.shopify.com/s/files/1/0428/0310/1863/files/t300_key_programmer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/5703/4902/files/vakaradiboloneku.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_off000061fc.bin
a84478a5dd63f376df98d209b759427acbcc0ff5fc9795590a42da5ca4bf39f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x61FC 5848 bytes
font_01_sfnt_off000075af.bin
7c45c5b0a32cb557b5fc2f3313a62d6444c739708e0eeb920c70348aee00bb05
pdf-font-stream PDF embedded font (sfnt) at offset 0x75AF 12028 bytes