Malicious PDF — malware analysis report

Static analysis result for SHA-256 e00fee49c91e38dc…

MALICIOUS

PDF

40.2 KB Created: 2020-08-14 19:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e8c2b04dcd57e870e9f7d6c38ee956a SHA-1: e7bdff6e20c0f273cbb02a0badd98eeeb7306a6b SHA-256: e00fee49c91e38dcb30efc70afa6ad78e23ab360c8eaa0be24f9222986861e20
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs. The primary malicious URL identified is https://ttraff.com/wb?keyword=structuring%20your%20novel%20workbook%20pdf, which is likely used to redirect users to a malicious payload or phishing site. The document body itself is largely unreadable binary data, but the presence of the malicious URL and the link farm behavior strongly suggest a malicious intent, possibly for SEO manipulation or to distribute malware.

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/wb?keyword=structuring%20your%20novel%20workbook%20pdf
    • http://kugine.dwarfhollowfarmstead.com/uploads/1/3/2/3/132303382/vimidazej-jokuvufopotal-jodoxa-jasuxipivibas.pdf
    • http://files.midwalestourismawards.co.uk/uploads/1/3/1/6/131636683/3189355.pdf
    • https://cdn.shopify.com/s/files/1/0452/2446/0445/files/alimentos_ricos_en_yodo_hipotiroidismo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/4460502844.pdf
    • https://cdn.shopify.com/s/files/1/0437/1644/4315/files/togajugabafezitoxit.pdf
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/56044802824.pdf
    • https://cdn.shopify.com/s/files/1/0446/6386/5497/files/solid_converter_to_word_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/larejaxulimiwoxuvegebuli.pdf
    • https://cdn.shopify.com/s/files/1/0438/8257/8088/files/case_interview_secrets_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0437/4613/2119/files/filumis.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/98435604437.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/python_binomial_coefficient.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/28082758026.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/wufifaderuzulozor.pdf
    • https://cdn.shopify.com/s/files/1/0435/3448/3616/files/jodugogopagajivivebodumi.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f03.bin
e8e28337e00bac3b980f02d9274868d03ed90c5f6673967683d62e0158177a82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F03 5496 bytes
font_01_sfnt_off000071e4.bin
0de888b6f909abbdea3707ccda56ecdb06b8988552680c0d5e452287c6b4f5a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E4 9884 bytes

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