Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc1f0acf77d1f3b8…

MALICIOUS

PDF

46.4 KB Created: 2020-08-04 11:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b1c6f1ae13201bf923cefc95a03209b SHA-1: 0d6083a3ab6b77639136c4667c01d0d96cb93520 SHA-256: fc1f0acf77d1f3b85c8cffacf06d1dc12430e3589fd8b4065bee8150eceaf664
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by a machine learning classifier as malicious and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files, many of which are hosted on Shopify. The primary malicious URL identified is https://ttraff.com/pify?keyword=activating+seer+anointing+pdf, which is likely used to redirect users to a malicious site. No scripts were extracted, but the extensive link farm suggests a phishing or malware distribution attempt.

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=activating+seer+anointing+pdf
    • http://files.charmantconnect.com/uploads/1/3/1/6/131636654/vifot.pdf
    • http://files.andimcnair.com/uploads/1/3/1/8/131872238/bedini.pdf
    • http://files.multimodalwritingcenter.org/uploads/1/3/1/4/131406140/bewemijo.pdf
    • http://files.jpgallagher.co.uk/uploads/1/3/2/6/132682787/fcb51da.pdf
    • http://files.neuropsyfi.com/uploads/1/3/1/4/131453595/255936.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/kawenuniku.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/zijulalobowuk.pdf
    • https://cdn.shopify.com/s/files/1/0436/6237/7113/files/banazuwixik.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/jojedidetojo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5316/1367/files/72166878139.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xizujebekox.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/bricks_intensive_reading_2_answer_key_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0429/0392/8991/files/77922819783.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/89826106888.pdf
    • https://cdn.shopify.com/s/files/1/0436/2538/2051/files/16426723198.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/suxuteregejo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/62194584802.pdf
    • https://cdn.shopify.com/s/files/1/0430/7891/0106/files/xelibumunepomorebogoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/3462/4679/files/669420506.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/81806598145.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077bb.bin
bb4d1d46120cd727b4363c812bae8da53efbabd939ec268e014007825b0a55b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77BB 5340 bytes
font_01_sfnt_off00008a05.bin
0cf96cf765a6cd9d31d64919089fe9e78c8ad56ba4a5efe5b07a9956e178e3ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A05 10004 bytes

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