Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aaf596f8fb40d8f…

MALICIOUS

PDF

36.7 KB Created: 2020-08-21 06:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18c68fc843d4a7544812fe9f125cafb2 SHA-1: 6dde24caf10c01ee2c5281daf991cf016d905add SHA-256: 0aaf596f8fb40d8f0a5c907cd91271696a1f576ce131dba61e1f89b2112ce600
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a malicious intent to distribute further content or malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lead users to malicious sites, likely as part of a phishing or malware distribution scheme.

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/pify?keyword=bostik+expanda+foam+safety+data+sheet
    • http://files.mpregobsession.com/uploads/1/3/2/7/132710665/650db325bb32049.pdf
    • http://joban.player2reviews.com/uploads/1/3/1/3/131383791/588b72668bb.pdf
    • http://files.biggsbassethounds.com/uploads/1/3/1/8/131857071/84fb7a2093dbc.pdf
    • http://files.foodwastetruck.com.au/uploads/1/3/1/3/131383483/a4d9ba5efd71c7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/4288/0160/files/knowing_god_ji_packer_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/4232/4125/files/fistula_ani.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0309/files/98989339241.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/evoluo_da_atmosfera_terrestre.pdf
    • https://cdn.shopify.com/s/files/1/0432/5526/7496/files/jepesosalanalanozul.pdf
    • https://cdn.shopify.com/s/files/1/0437/0923/5355/files/90895799715.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/13816805390.pdf
    • https://cdn.shopify.com/s/files/1/0435/9464/5672/files/digital_electronics_basics_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0429/7277/4556/files/favoxevivojukudejek.pdf
    • https://cdn.shopify.com/s/files/1/0438/0560/6049/files/witaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/3395/9327/files/employee_reference_letter_word_format.pdf
    • https://cdn.shopify.com/s/files/1/0437/2276/8535/files/gosipa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000043d1.bin
15e147d631094e843b5cc1b68738d29837c0f37763d11b3d4514c77cb21ab60a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43D1 5224 bytes
font_01_sfnt_off00005578.bin
12bd101720f2705b2d8e0fe5a6fdd0b318ff73fb59d03bc1af705a7025c02751		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5578 9564 bytes
font_02_sfnt_off00007634.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7634 4324 bytes

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