Malicious PDF — malware analysis report

Static analysis result for SHA-256 66a430a562876595…

MALICIOUS

PDF

48.9 KB Created: 2020-08-04 19:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd6fb0a0285e2f11e40f698695f77b72 SHA-1: 652589a69fbb6b23f820498e4fa274e534cf78c3 SHA-256: 66a430a562876595e90793e18413a31a44c18b609eee4bdd274d2b732e04c637
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 of which point to external PDF files hosted on Shopify and other domains. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.cc), suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the URL that triggered this heuristic, indicating the document's primary purpose is to facilitate redirection.

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=aditya+hrudayam+slokam+in+tamil+pdf
    • http://files.hebshf.com/uploads/1/3/1/8/131871462/7644777.pdf
    • http://lurevemav.monarchtennis.com/uploads/1/3/1/8/131871462/venumataloxu-sejofo-fazijixekuval.pdf
    • http://files.neal-insurance.com/uploads/1/3/1/8/131857334/a91db9bf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0434/5266/1912/files/givejesep.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/piluboduvojimilojo.pdf
    • https://cdn.shopify.com/s/files/1/0448/0499/7271/files/fight_cave_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/88049729518.pdf
    • https://cdn.shopify.com/s/files/1/0433/7913/0524/files/sojuwozowetaluxofevuzin.pdf
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/lipifogagopujinet.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/89081528196.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5289/files/rezojibamuxozirinupodajo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7104/files/82068695094.pdf
    • https://cdn.shopify.com/s/files/1/0428/1086/7871/files/black_mirror_white_christmas_script.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/luzikakadarufuxa.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_off0000626c.bin
f3b869898f8ba9e6132201a2cac82342ce92fd4b041a260ad6eaeafd84a35e70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626C 5436 bytes
font_01_sfnt_off000074c3.bin
b578365b51b44ad859140ff5162df1b80498d72bae300421e05d0d9e33e21f39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C3 7696 bytes
font_02_sfnt_off00008ad4.bin
e0d798768803d73be828c4cd1194585c316fdb4e2b094ba081ac0da39d28abb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD4 14180 bytes

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