Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d18801ea103ce0f…

MALICIOUS

PDF

36.2 KB Created: 2020-08-17 16:14:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b08371b74b566117a07bc7fb06f29c04 SHA-1: 93b9924f61f1319733a7921ff3f3dfaeec495ce7 SHA-256: 5d18801ea103ce0fbb6324a9fa7aef791469e502a7d5ba567309ae7b4a65d2b1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=hada+labo+facial+sheet+mask`. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=hada+labo+facial+sheet+mask
    • http://files.babyjawn.com/uploads/1/3/1/4/131407668/da3828b8cd.pdf
    • http://rapamedup.leeclarkzumpe.com/uploads/1/3/0/8/130874104/26faa6e67233.pdf
    • http://files.u3ahavelocknorth.com/uploads/1/3/0/7/130776327/6cedc4dfa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/47404491822.pdf
    • https://cdn.shopify.com/s/files/1/0431/2501/4685/files/8004020126.pdf
    • https://cdn.shopify.com/s/files/1/0439/4074/1275/files/tejabin.pdf
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/ruleletuguxegep.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/95121142914.pdf
    • https://cdn.shopify.com/s/files/1/0433/4066/0904/files/71942632418.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/59579162026.pdf
    • https://cdn.shopify.com/s/files/1/0431/1079/3370/files/xozugiwelakepapaziwilo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6727/files/45006309272.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mokotutirajozejimus.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/6916069412.pdf
    • https://cdn.shopify.com/s/files/1/0432/8741/2900/files/zixaxozumefuxex.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6918/files/capitals_and_currencies_of_important_countries.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/dutefasudi.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_off00004e99.bin
272e48c6c5c9f1ab279a6ffa634553217225e6b7c79dc832a28b250d8f72fbe4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E99 5332 bytes
font_01_sfnt_off00006095.bin
dc498e64fd408abf9d57d530b4c92c3077bad73d07f2e77eb7580dbc4d20171f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6095 10000 bytes

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