Malicious PDF — malware analysis report

Static analysis result for SHA-256 66667e525d8c79fa…

MALICIOUS

PDF

39.5 KB Created: 2020-08-27 23:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef957e9eb889a379811f7cf11a8ed72f SHA-1: 587eeef8be25d4fa45b682856bcf326994333ced SHA-256: 66667e525d8c79fafbe70056aaba5086258970eb96f88e8271e7d6b21cf67229
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains text related to a 'price guide' and the malicious URL, suggesting a lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating an attempt to distribute or host malicious content.

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.cc/pify?keyword=boyds+bears+price+guide
    • http://files.nationalscientific.co.uk/uploads/1/3/0/8/130874588/02e28043e3.pdf
    • http://files.fredsgaard-classic.com/uploads/1/3/0/7/130738822/witexixa.pdf
    • http://files.eldertwopotato.com/uploads/1/3/0/8/130815017/3802946.pdf
    • http://sabijafi.alittlepeaceayurveda.com/uploads/1/3/0/7/130775388/4741573.pdf
    • http://files.kathrynrobertson.co.nz/uploads/1/3/1/4/131453651/1049ac4a99a9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4642/1158/files/faithless_drifting_away_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/3296/1443/files/68256262216.pdf
    • https://cdn.shopify.com/s/files/1/0440/0922/6398/files/sekesa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7946/7170/files/13086693785.pdf
    • https://cdn.shopify.com/s/files/1/0458/6297/7689/files/thor_ragnarok_streaming_vostfr_hd.pdf
    • https://cdn.shopify.com/s/files/1/0430/0819/6767/files/93410401740.pdf
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/super_boot_manager_ubuntu_18._04.pdf
    • https://cdn.shopify.com/s/files/1/0430/9109/9805/files/41524352667.pdf
    • https://cdn.shopify.com/s/files/1/0428/9075/6259/files/gopefadakisowigobepave.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/pdf_to_word_online_100_free_convertertoword._online.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/lipid_profile_chart.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_off00005cd0.bin
a051af2bf34270cc6fac0401ee7a45b21ccd926c6d2990101749a57fabcc7533		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD0 5500 bytes
font_01_sfnt_off00006f93.bin
cad643966468357e4be8f59759871293eb082709e535d1eabe931902ec11bde1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F93 9840 bytes

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