Malicious PDF — malware analysis report

Static analysis result for SHA-256 34135a594acd3291…

MALICIOUS

PDF

39.0 KB Created: 2020-08-31 20:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5006c7ae4ac6c6e9975149c101d461dc SHA-1: 06d5fb9b3693b1434a4404b243c97df1e71f97b2 SHA-256: 34135a594acd32918eaa0d7971037b4d15db33de8c3240f39ee839a3ed7e8070
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=adpc+ssa+full+form
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/4cf28d_eaece787d2ff4d538fe1e9991c3d2253.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a8ad91729344fc3b58bda20d64696c8.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_6e8c55a883c54e5b8abbea2baa192fc7.pdf
    • https://static.usrfiles.com/ugd/c75f60_d667afa4afa648adaeabc44459d1394a.pdf
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/23247300861.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/pawozixutu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8246/4928/files/chelsea_arsenal_match_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/akiba_s_trip_undead_undressed_ending_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9639/files/xuterulakijo.pdf
    • https://cdn.shopify.com/s/files/1/0461/7450/3065/files/49938568048.pdf
    • https://cdn.shopify.com/s/files/1/0435/5833/8715/files/zisatixenirago.pdf
    • https://cdn.shopify.com/s/files/1/0433/7847/5162/files/76869739666.pdf
    • https://cdn.shopify.com/s/files/1/0436/2724/9826/files/add_transparent_png_to.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_off00005b81.bin
a45a4a16721ca2313f017dab63abdb1bbca9f8314df4bdf43f23fb0ff8d09663
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B81 5288 bytes
font_01_sfnt_off00006d6d.bin
1f94a07bc7420592930d6d8101bf1f22ae98e17188c1402b46478298a8dd438d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6D 10076 bytes