Malicious PDF — malware analysis report

Static analysis result for SHA-256 25f36d33e410e11f…

MALICIOUS

PDF

33.0 KB Created: 2020-08-22 03:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 171134af569fd9777c7c4edda2cce554 SHA-1: 8068248763cf2bb25a4bda1672b034b4810dc37c SHA-256: 25f36d33e410e11f3cff1aae76d55d2725b72faaf379f6586ae94b7c83cb0f83
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes text related to 'Kingspan phenolic pipe insulation data sheet' and a URL that aligns with the malicious redirector. This suggests a phishing or malware delivery attempt disguised as a technical document.

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=kingspan+phenolic+pipe+insulation+data+sheet
    • http://tufopupo.ohonnury.com/uploads/1/3/1/4/131453574/jobuwami_kotewogilinewos.pdf
    • http://files.loveloveandlove.org/uploads/1/3/1/4/131406448/a8bf9b71.pdf
    • http://mifadosox.bridgeofmusic.org/uploads/1/3/1/0/131070197/rowenenunugaw-xixexibegotijo-towojejefemulud-lebix.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/ruronasukurobusubefa.pdf
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/free_online_template_for_resume.pdf
    • https://cdn.shopify.com/s/files/1/0437/4380/5594/files/hemifacial_spasm_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3590/files/rotononugivegojepuxexiru.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/catholic_social_teaching_textbook_saint_mary_press.pdf
    • https://cdn.shopify.com/s/files/1/0433/9400/7201/files/puketozigufevawukudifoko.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1293/files/82176374825.pdf
    • https://cdn.shopify.com/s/files/1/0431/5889/6802/files/minecraft_pe_hunger_games.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004577.bin
7d0a1928cd4667dc336dcdcfd6bb71d3589c8912aa7687ef4efd870c7ffabd86
pdf-font-stream PDF embedded font (sfnt) at offset 0x4577 5208 bytes
font_01_sfnt_off00005729.bin
a91bb39bda364abc8a82aead640e6597d33fcd1bcf7dda8dfd465deb962c0b08
pdf-font-stream PDF embedded font (sfnt) at offset 0x5729 9436 bytes