Malicious PDF — malware analysis report

Static analysis result for SHA-256 082f817302a3f0ba…

MALICIOUS

PDF

89.6 KB Created: 2020-09-07 05:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 924614d2b232609b3109ad635beecc05 SHA-1: 68877e1ede7e8fe1cd8c7a43a5a69162c2801302 SHA-256: 082f817302a3f0ba41de75d992eabe8eab0d3a82fa2281537214c71fdbc857c8
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.me/wix?keyword=b+i+f+r+full+form'. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or redirection attack.

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.me/wix?keyword=b+i+f+r+full+form
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20659662050.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/cryptic_quiz_answers_4-_n.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9376/files/fupanonemuwuwez.pdf
    • https://cdn.shopify.com/s/files/1/0428/1751/9772/files/4054099663.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23158701460.pdf
    • https://cdn.shopify.com/s/files/1/0438/2602/0509/files/channel_12_long_island_weather_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/rassembler_plusieurs_en_un_seul.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/bjt_amplifiers.pdf
    • https://cdn.shopify.com/s/files/1/0437/6877/4814/files/31651646723.pdf
    • https://static.usrfiles.com/ugd/b8c837_61d9d0763a574bbc9cf8f15926b14db5.pdf
    • https://static.usrfiles.com/ugd/b8c837_9cf5d56a661243fba9817a90c2b050e1.pdf
    • https://static.usrfiles.com/ugd/158fb9_88c229a65903417ba4f6e97164b5a1b0.pdf
    • https://cdn.shopify.com/s/files/1/0438/1723/8685/files/westworld_movie_1973.pdf
    • https://cdn.shopify.com/s/files/1/0428/0975/3767/files/30670947633.pdf
    • https://cdn.shopify.com/s/files/1/0435/4464/1695/files/zutapijulisipizovifab.pdf
    • https://cdn.shopify.com/s/files/1/0432/8282/5376/files/wopomogojixaponifiputin.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_off0001242a.bin
63a4e12976e81b1655bb28df8984d023153275d544b8943502d142699ed8b918		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1242A 4576 bytes
font_01_sfnt_off000133a4.bin
afa2eb277e1dbaf56c7e338f3cdaae08048a39fdb6d1a339645f35aa2b7410a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133A4 10984 bytes

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