Malicious PDF — malware analysis report

Static analysis result for SHA-256 18fc3af6c6a30654…

MALICIOUS

PDF

39.8 KB Created: 2020-08-20 09:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 334232cf4b8a19b84ab5320c1b3e4c14 SHA-1: c6acc6b626ff5da6ad7aa74a3f1fb7b75fd0b24d SHA-256: 18fc3af6c6a30654b9c0ee1dcde49ca4555bc68931aca68237fa20f9d7cd4af1
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to phishing or malware download sites. The document body, though heavily obfuscated, contains this URL and numerous other links to PDF files hosted on Shopify, suggesting a link farm or content stuffing tactic. 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.com/pify?keyword=katlicherra+hailakandi+weather+report
    • http://files.williwisedaycamp.com/uploads/1/3/1/4/131407029/finanepagavedi.pdf
    • http://files.wfcharborne.com/uploads/1/3/1/1/131164476/8951489.pdf
    • http://files.whitewavemedical.com/uploads/1/3/0/7/130738803/dedozul.pdf
    • http://files.sarahharkness.info/uploads/1/3/1/0/131071082/68d34fdec80e15.pdf
    • http://files.crystalcoastbooks.com/uploads/1/3/1/0/131069764/miwiritawi_zorarela_butamek_laxizabuniv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/3824/3996/files/anthropology_research_paper.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8685957786.pdf
    • https://cdn.shopify.com/s/files/1/0432/2862/7099/files/tv_show_websites.pdf
    • https://cdn.shopify.com/s/files/1/0434/9709/5333/files/hypoxic_ischemic_encephalopathy_pathophysiology.pdf
    • https://cdn.shopify.com/s/files/1/0437/7837/5831/files/english_vocabulary_words_with_meaning_in_urdu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/1880/3610/files/dakofufedekupigi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/24037059770.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/penedulo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5329/2440/files/dialogue_worksheets_for_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0430/9005/1221/files/33851986398.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_off00004b2c.bin
1277adaca7d6f8c399cb8a877085d73a261c164f546864815cbf321897bbc158		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B2C 4896 bytes
font_01_sfnt_off00005bc4.bin
89070b945e35f6d729957a665fb2376f6a0b370a1c3735f481b65a771e9aa49d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC4 12188 bytes
font_02_sfnt_off0000827a.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x827A 4324 bytes

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