Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b1fb1ad0ab1380e…

MALICIOUS

PDF

42.1 KB Created: 2020-08-12 22:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1eb1643ecee6ed5996ff14a928c90596 SHA-1: c33cc4f6a35a09f23aaa8f4d4a9a066234974b78 SHA-256: 6b1fb1ad0ab1380e2f88b0cef875bd15a2f46503a8f522bba6e016460d79f9a8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though obfuscated, suggests a lure related to 'Arduino mega specifications pdf'. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to distribute malicious content or traffic.

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=arduino+mega+specifications+pdf
    • http://files.kinderstubepreschool.org/uploads/1/3/1/3/131383924/sufugakibunakenijemi.pdf
    • http://dabusu.conservatoryathome.com/uploads/1/3/2/8/132814989/1285634.pdf
    • http://files.logancountyhistoricalsociety.org/uploads/1/3/1/6/131637498/zimiwe-tizaxinadajazo-rebuvufa.pdf
    • http://files.coloradowolfandwildlife.com/uploads/1/3/1/8/131871467/45136bab149a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/gabamib.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/35333708427.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0093/files/gumodiderusodebiwowi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2290/1663/files/18221994380.pdf
    • https://cdn.shopify.com/s/files/1/0440/4038/8758/files/dofisogukosututenuwavoduk.pdf
    • https://cdn.shopify.com/s/files/1/0429/2503/1590/files/breeding_for_biotic_and_abiotic_stress_resistance.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/31078231209.pdf
    • https://cdn.shopify.com/s/files/1/0431/9952/9120/files/gipezexujujasexalaz.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9165/files/wotarelisawebojeli.pdf
    • https://cdn.shopify.com/s/files/1/0429/9581/0455/files/983415288.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/pixakurogilu.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_off00006748.bin
8852a1040a527f4f8e6348b01fb2abc70030d83b7e6c4800f4d441041f5e255f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6748 5432 bytes
font_01_sfnt_off000079a6.bin
018d68b9f58b52f8026fee6d7e9c1b147a4fba5b70d913d2e4c382511e8c363f
pdf-font-stream PDF embedded font (sfnt) at offset 0x79A6 9872 bytes