Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d731464cd9e6b4b…

MALICIOUS

PDF

51.0 KB Created: 2020-08-07 12:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2f460e508fe2181b535ea5371a49069 SHA-1: 03581bab487cf3ba4f070c9c9dcabb9418f7d7fe SHA-256: 6d731464cd9e6b4b31d71a139d23e5e7ff3336bcef41bb0d59d3850143277804
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=anton+aubanell+pdf'. The document body also contains this URL and numerous other links, many pointing to Shopify domains, suggesting a link farm or SEO spam tactic. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves directing users to malicious sites, likely for phishing or malware delivery.

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.ru/pify?keyword=anton+aubanell+pdf
    • http://files.estherwayne.com/uploads/1/3/2/7/132740291/9042839.pdf
    • http://xagefi.theprobet.com/uploads/1/3/0/9/130969744/wibaposipinatub-sanivuvarivim-nivapodexin-sovupez.pdf
    • http://files.mylifebuilder.org/uploads/1/3/2/6/132680932/6235604.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/6212/3941/files/50438895552.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/lomozej.pdf
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/73384417404.pdf
    • https://cdn.shopify.com/s/files/1/0434/2992/0930/files/26313688776.pdf
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/target_band_7_ielts_academic_module_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/2830/8387/files/porsche_buyer_s_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/5490/4997/files/aatrox_build_s7.pdf
    • https://cdn.shopify.com/s/files/1/0433/0484/5465/files/rojogumade.pdf
    • https://cdn.shopify.com/s/files/1/0432/2964/2911/files/51247281261.pdf
    • https://cdn.shopify.com/s/files/1/0434/4542/0188/files/63863158054.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/69997523645.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/kefavo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0913/0143/files/18913757289.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_off00007e1d.bin
8565740c239673df5f281b43bd5135ad4f2d832a066e6ceac2547d7f47e8e3f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1D 4724 bytes
font_01_sfnt_off00008e39.bin
8d488c7451071e4683959776d5bf5c61351fee368797e2ae3e52cb8335624491		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E39 10120 bytes
font_02_sfnt_off0000b0db.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0DB 4324 bytes

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