Malicious PDF — malware analysis report

Static analysis result for SHA-256 13afda17d3f2740f…

MALICIOUS

PDF

55.7 KB Created: 2020-08-29 22:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e891a87a3dd3755c103991246e8df758 SHA-1: be0d75eee4305001fb817c75f77bf699e7ce9197 SHA-256: 13afda17d3f2740f6f9e728b70b779218c1485aa9e9d1216a8e2436d630781e7
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/wix?keyword=wearfit+smart+bracelet+manual+espa%25C3%25B1o', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'wearfit smart bracelet manual' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous other links to Shopify PDFs indicates a potential link farm or SEO manipulation tactic.

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/wix?keyword=wearfit+smart+bracelet+manual+espa%25C3%25B1o
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mulobovapu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0306/7044/files/funny_new_years_meme.pdf
    • https://cdn.shopify.com/s/files/1/0432/7761/5270/files/dadevidunemusib.pdf
    • https://cdn.shopify.com/s/files/1/0437/7352/6178/files/algebra_2_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/7506/7297/files/91566654081.pdf
    • https://cdn.shopify.com/s/files/1/0434/0849/0663/files/12736185060.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/jivanerata.pdf
    • https://cdn.shopify.com/s/files/1/0438/0046/1474/files/92428208215.pdf
    • https://cdn.shopify.com/s/files/1/0432/5274/4356/files/55027673331.pdf
    • https://cdn.shopify.com/s/files/1/0436/8600/2838/files/pajewogozum.pdf
    • https://static.usrfiles.com/ugd/b8c837_062531f5b7a641fdaaa0b3fccb86bb02.pdf
    • https://static.usrfiles.com/ugd/d01287_96eb1dff7e074fc5bfc9fbd90eb58662.pdf
    • https://static.usrfiles.com/ugd/f80014_83359dcfdabe4faca184f16786145672.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0c0ceca269946ed84108e499f627310.pdf
    • https://static.usrfiles.com/ugd/63022f_953a94c5cbce45e5964ea7881fc8ec46.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a36094868c549edb7d52b3539906ddd.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_off000099c0.bin
1f9f7afec1d2b405556dfe205a2e70649c7005521803b1bd7eb192bbf45141af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99C0 5528 bytes
font_01_sfnt_off0000ac34.bin
4303c17267956b38ff01eb6f9910b2ae7ae8944ca2e07e24d34374dc8624bcf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC34 10788 bytes

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