Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c26a9b348d047f…

MALICIOUS

PDF

36.3 KB Created: 2020-08-21 02:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80171b77738e9adb06a29dce6beec702 SHA-1: a751a29e6e7793ef19f44f6becbabb34fac693c5 SHA-256: 17c26a9b348d047f44cc9f4f2c92468e60c0e880024d6846bb23662a822c9cf0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic designed to lead users to malicious content. The ML classifier strongly supports the malicious verdict.

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=luminous+silk+shade+guide
    • http://files.perreaultchiropracticrushcity.com/uploads/1/3/2/3/132303060/fapotarawew-resenekewegu.pdf
    • http://files.wiffrudd.com/uploads/1/3/0/8/130813698/d99e7.pdf
    • http://doselofe.mountaintechnicalsolutions.com/uploads/1/3/2/6/132696067/437f979bba74698.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/numogebekibomax.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/geguvijanozibovix.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3669/files/negonekakiwexufixemam.pdf
    • https://cdn.shopify.com/s/files/1/0428/1889/6038/files/46065331844.pdf
    • https://cdn.shopify.com/s/files/1/0434/3755/5864/files/zelupixuto.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5453/files/36371801312.pdf
    • https://cdn.shopify.com/s/files/1/0434/0056/0805/files/lemerixagufa.pdf
    • https://cdn.shopify.com/s/files/1/0435/2793/0011/files/flower_of_life_sacred_geometry.pdf
    • https://cdn.shopify.com/s/files/1/0430/0305/2191/files/rockwood_pop_up_camper.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/56007756356.pdf
    • https://cdn.shopify.com/s/files/1/0438/1730/4226/files/abbyy_transformer_3._0_serial_keygen.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_off0000447d.bin
7fea9e5effd7e32bb1a745651b405a9e66845d70977c3433f3bbcaee42546ab1
pdf-font-stream PDF embedded font (sfnt) at offset 0x447D 4952 bytes
font_01_sfnt_off0000551a.bin
2b5bd687d930a93d6e993fc6d9321ca089e2d6b796718e99ac88da8a25ca7dea
pdf-font-stream PDF embedded font (sfnt) at offset 0x551A 9768 bytes
font_02_sfnt_off0000767f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x767F 4324 bytes