Malicious PDF — malware analysis report

Static analysis result for SHA-256 028ab51272745e03…

MALICIOUS

PDF

55.0 KB Created: 2020-08-28 03:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0509ac04df84de321c527571db5a27c2 SHA-1: ae72c862a9d97de6f20edd97a9d83f303447de3a SHA-256: 028ab51272745e03c69513ba47b53c7c7023023064f5115bdcb8f036c0192a94
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 'https://ttraff.ru/pify?keyword=200+pounds+beauty+english+subtitle'. Additionally, it exhibits a PDF link farm heuristic, embedding numerous external PDF links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The embedded links suggest an attempt to drive traffic to potentially malicious or SEO-poisoned content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=200+pounds+beauty+english+subtitle
    • http://files.thelostblonde.com/uploads/1/3/2/6/132682076/d613cf6f735.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/1220/2389/files/ginuxob.pdf
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/vuxazixuwuxagowa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1582/2747/files/cursive_writing_chart.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/32022634502.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2341/files/27242677996.pdf
    • https://cdn.shopify.com/s/files/1/0434/2664/4125/files/bdd_story_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39806276645.pdf
    • https://cdn.shopify.com/s/files/1/0460/7783/7476/files/analog_clock_widget_for_windows_xp.pdf
    • https://cdn.shopify.com/s/files/1/0434/7022/5574/files/lozulo.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004963.bin
c0fcc41018fb83f0b45b3f5a55f777522ef4dd2e7cd5b68d0eaa66f41ab9bc19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4963 7608 bytes
font_01_sfnt_off0000637b.bin
38403409880d5a102a2593835bae644aa365202893da424917c8caa0b9c9705c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x637B 5428 bytes
font_02_sfnt_off000075d4.bin
5c304569b23ed276af9751cf601dbe5a07a83b6c82ee546a5f29cef570308721		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D4 2224 bytes
font_03_sfnt_off00007ff3.bin
fc8ab6b6b04f0f9c31dea31217623ab879a9591d01901ba1474bdd5a520b15fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF3 13340 bytes
font_04_sfnt_off0000aa98.bin
ed45a24507f18daeaf6b6e9cac20235e9e43bed88bc2d44b7621eff085e31190		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA98 16344 bytes
font_05_sfnt_off0000c010.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC010 4324 bytes

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