Malicious PDF — malware analysis report

Static analysis result for SHA-256 67fde2136b767f7d…

MALICIOUS

PDF

45.1 KB Created: 2020-08-23 00:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46a0faf46ef73f0c58839610ec569c06 SHA-1: ae8e9389081732f2722ae0806d554b9fd45a5012 SHA-256: 67fde2136b767f7d24c564dfe061485373a936f83c53e455ed509b3eba140e0e
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body contains a URL that appears to be part of a link farm, aiming to attract traffic through search engines.

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=common+drugs+and+their+antidotes+pdf
    • http://jiwegibas.judyherman.com/uploads/1/3/1/3/131398134/3283638.pdf
    • http://files.oasisorientalmedicine.com/uploads/1/3/1/8/131856079/tenopalumod-nonif-bamesidajirudi.pdf
    • http://tizusonog.nutripol.org/uploads/1/3/0/8/130873822/3904238.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/5312/8612/files/ytd_er_for_pc_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/sojoxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4445/4051/files/frostgrave_wizard_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/2857/6416/files/83563891704.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/21233901153.pdf
    • https://cdn.shopify.com/s/files/1/0436/0817/8850/files/banjo_tooie_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0436/2256/4000/files/35223849084.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/nasow.pdf
    • https://cdn.shopify.com/s/files/1/0435/9772/5864/files/battlefield_4_commander_app_apk.pdf
    • https://cdn.shopify.com/s/files/1/0438/8572/3816/files/53774669437.pdf
    • https://cdn.shopify.com/s/files/1/0437/8846/8376/files/juduvugesifurekivi.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_off00006467.bin
980f5445935c65cac9a852c94124a75385784a91094e11f934027b51c1e3217e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6467 5328 bytes
font_01_sfnt_off00007653.bin
80fee7c531a2b2415ea6996b762f5e8ebb7ab2f1ce6997dd5e3e848f1b05edd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7653 10176 bytes
font_02_sfnt_off0000990c.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x990C 4324 bytes