Malicious PDF — malware analysis report

Static analysis result for SHA-256 6476cfffac0911cc…

MALICIOUS

PDF

48.6 KB Created: 2020-08-11 08:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: effd572d24ac3134e70f2feb9e3deb2d SHA-1: 2f7667945106d9238b7f77fcb79684154f0bef75 SHA-256: 6476cfffac0911cc6612dad09873b4176eda2073636787dbe3057891bcde05fe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to SEO-optimized PDF files hosted on Shopify. One of the primary links directs to a known malicious redirector infrastructure. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites.

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.com/pify?keyword=bosquejos+biblicos+bautistas+para+predicar+pdf
    • http://files.tuiridgeaustralianlabradoodlesnz.com/uploads/1/3/0/7/130739376/8339003.pdf
    • http://tinosezir.trimstechnology.com/uploads/1/3/0/7/130738629/pumidamizubugidipuba.pdf
    • http://files.souloving.com/uploads/1/3/1/0/131070560/dufosinovud.pdf
    • http://files.victorialeeoboe.com/uploads/1/3/0/7/130739713/kizusewev.pdf
    • http://files.sosinsuranceagencies.com/uploads/1/3/2/7/132712282/fc63acd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/2249/0532/files/portable_electric_winch.pdf
    • https://cdn.shopify.com/s/files/1/0437/9623/4400/files/56414752488.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/agentes_economicos_en_economia.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/33390371715.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/zimavox.pdf
    • https://cdn.shopify.com/s/files/1/0434/0645/9032/files/discovering_behavioral_neuroscience_4th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5494/files/piano_arpeggio_technique.pdf
    • https://cdn.shopify.com/s/files/1/0428/1368/5927/files/5959351837.pdf
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/21953700161.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3468/files/wovozelifavagebupinikeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/5897/7178/files/pabuzusanado.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuvekalododit.pdf
    • https://cdn.shopify.com/s/files/1/0427/8986/3580/files/nilut.pdf
    • https://cdn.shopify.com/s/files/1/0434/2510/4028/files/california_dmv_vehicle_transfer_form.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c4b.bin
fcbda8b97876ca196a6c3c387597d72b275c9e1b9ac7aafbc64a06ed77b99a3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4B 5316 bytes
font_01_sfnt_off00007e72.bin
4f73ed4561ffd2eb50a5e5a32c6eccba8eb4e407e3e2a4dfb770760c8151ccd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E72 12132 bytes
font_02_sfnt_off0000a4e1.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4E1 4324 bytes

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