Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b8f4e937f2b4cf…

MALICIOUS

PDF

44.3 KB Created: 2020-09-02 13:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e5bacf8f36cf8edbef9c3919f487c5a SHA-1: c1c603afb4c09404216eaf2a8a3e4358c4f33ceb SHA-256: 69b8f4e937f2b4cf2078c599c14841e35435de2c240051e76efc465180869c71
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at https://ttraff.link/wix. The document body, though heavily obfuscated, contains the same query string as this malicious URL, suggesting an attempt to lure the user to malicious content. The presence of many benign Shopify links appears to be a tactic to disguise the 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.link/wix?keyword=what+does+georgia+guidestones+say
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/jan_assmann_cultural_memory.pdf
    • https://cdn.shopify.com/s/files/1/0431/7498/5885/files/manorama_year_book_2020_tamil_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2242/6013/files/32771390974.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3257/files/847163723.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/discord_markdown_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/71900310409.pdf
    • https://cdn.shopify.com/s/files/1/0434/1982/8386/files/vavujijugupelavofibun.pdf
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/79579196362.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/74679182321.pdf
    • https://static.usrfiles.com/ugd/3b47cb_b7fc7b872be3422d81e3434e8b3743ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_33906e7b17164d1da9613f6d42afb0ce.pdf
    • https://static.usrfiles.com/ugd/6f9b04_d48c0150cfa748d6b263e838428a0dc9.pdf
    • https://static.usrfiles.com/ugd/9c43ec_3134c22a020e499da3bbe486f6c25511.pdf
    • https://cdn.shopify.com/s/files/1/0448/1312/3744/files/kaziluzopozosanegaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/13200842061.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/83815641044.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40948382406.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_off00006e7d.bin
0d00646942286dd454e14d4ed7961ef1e81e201e7d6e2a8c03630914b062e796		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7D 5168 bytes
font_01_sfnt_off0000801f.bin
dd325f522ae1150506f262f249595eb9456f84db734bd1940071648123dfdf67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x801F 10916 bytes

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