Malicious PDF — malware analysis report

Static analysis result for SHA-256 5edfa8934230656a…

MALICIOUS

PDF

61.6 KB Created: 2020-08-25 01:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83bd2efe7d7c67185bbe4bebb688980c SHA-1: 289564467b080ef8abe9df6b1e385d9764135e28 SHA-256: 5edfa8934230656a65c63fbad6dd3daa28ce8244e30477ef3c89faf45c4a28fb
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service designed to obscure the final destination. The primary redirector URL is https://ttraff.cc/pify?keyword=informatica+edc+10.+2.+1+installation+guide, which is known to lead to malicious infrastructure. The document body, though partially corrupted, also contains this URL, suggesting an attempt to disguise malicious links as legitimate content. The ML classifier 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.cc/pify?keyword=informatica+edc+10.+2.+1+installation+guide
    • http://files.heatherbrittonphotography.com/uploads/1/3/0/7/130775053/pokudo-dukekokoze.pdf
    • http://fadeze.rbowtique.com/uploads/1/3/1/4/131453574/fiwinakebogovuvotas.pdf
    • http://xinupelom.danburyonfire.com/uploads/1/3/0/7/130775219/somosilaw_mazixe_zupozunugadigeb_soxojelupob.pdf
    • http://muvuxug.escapemachine.com/uploads/1/3/0/7/130775169/8cfb3246122.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1538/8840/files/2865215173.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87074842841.pdf
    • https://cdn.shopify.com/s/files/1/0431/7616/5536/files/vunowuxifijafifufajidapex.pdf
    • https://cdn.shopify.com/s/files/1/0432/2797/1741/files/enigma_otiliei_carte_online.pdf
    • https://cdn.shopify.com/s/files/1/0430/8847/8359/files/junolawinuwegimipoga.pdf
    • https://cdn.shopify.com/s/files/1/0437/4842/5889/files/answer_my_math_questions_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8359/files/5232346204.pdf
    • https://cdn.shopify.com/s/files/1/0463/1130/9469/files/55492639781.pdf
    • https://cdn.shopify.com/s/files/1/0438/1143/8752/files/mezivaxuworitir.pdf
    • https://cdn.shopify.com/s/files/1/0429/8457/1031/files/d-_400_schedule_s.pdf
    • https://cdn.shopify.com/s/files/1/0434/2228/5976/files/bazolinag.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1125/files/vaguxewivudotil.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_off0000a32f.bin
52516d901a57567b9da1497ca8ae7e4ebff8d2d2b2770a0c0fffe4b737ea26db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA32F 5636 bytes
font_01_sfnt_off0000b640.bin
ec1cd780d8de2f6b16517a96938e3b1c4af7111e16b546b8648399548c8537b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB640 16520 bytes

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