Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a2d93c1e232137…

MALICIOUS

PDF

51.1 KB Created: 2020-07-26 23:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 620155c38a781294973bb73bc390f6b2 SHA-1: 1ff44a41d5c58e28be0f1f286341eafcbd435bb5 SHA-256: 07a2d93c1e23213783e9d2f9028abc5b2503480cf8d48ff75b988d6af64ada87
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and appears to be junk data, but the presence of numerous links suggests an attempt to direct users to potentially harmful external sites, possibly for SEO spam or phishing.

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=airlift+performance+manifold+cover In PDF document text
    • http://files.manalgarciafitness.com/uploads/1/3/1/4/131453985/patorifoke_jisizizup_puvutarazi_powezegimiwuv.pdfIn PDF document text
    • http://files.exoticedventures.com/uploads/1/3/2/6/132682204/patewipavefa.pdfIn PDF document text
    • http://files.southernmainewritingproject.org/uploads/1/3/0/7/130775830/zovaluvi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4922/0256/files/nusupipexirida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/xakowoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/87667325033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1157/0838/files/tabaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/vobex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/55340717330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8092/4840/files/99682318458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/jipifiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kofuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9054/2743/files/nukisegoniburesunutop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2804/5209/files/71136319377.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0684/3288/files/wapovivine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7631/3503/files/xopatok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/1664187201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/sibom.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000787a.bin
022572470c9f3d12bac5592c3e58fc945476db22d772ad66a5424c61dd86c2c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x787A 4960 bytes
font_01_sfnt_off00008933.bin
21016be7b4b78d65b573dc71f687335097fc470406448dde8739788de3e89c6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8933 16740 bytes

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