Malicious PDF — malware analysis report

Static analysis result for SHA-256 8082650e0fcc6e15…

MALICIOUS

PDF

44.1 KB Created: 2020-08-22 21:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa92871962115158d5357413f6073c48 SHA-1: 62616b03cff4fd6b391e9b64f7bac0b2222800b6 SHA-256: 8082650e0fcc6e157bfe1b9afabfbeeba587a3ef63cd4cb4fb6687682dabceea
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=burrowers+2008+full+movie'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to improve search engine ranking for malicious content. The ML classifier also 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=burrowers+2008+full+movie
    • http://files.trailerboxproject.com/uploads/1/3/1/0/131070216/48c00.pdf
    • http://files.wv469.com/uploads/1/3/1/3/131383456/xasif.pdf
    • http://files.threeoakwinery.com/uploads/1/3/1/4/131482944/zugebe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/79564303850.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3101/files/cetoacidosis_diabetica_criterios.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/jorotidimex.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4214/files/epipen_jr_weight_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5561128363.pdf
    • https://cdn.shopify.com/s/files/1/0429/4675/6774/files/adoption_law_in_the_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0428/5349/9046/files/lie_nielsen_honing_guide_worth_it.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2636/files/jofefulotun.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/98614978359.pdf
    • https://cdn.shopify.com/s/files/1/0438/0947/2669/files/duzojoxofirulinofala.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/activated_carbon_filter_for_wastewater_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/jererapitagowi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f96.bin
e00996288f2d25254fe07969ff82a74d896b0da1e13ebc1987524efe4bbeffce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F96 5068 bytes
font_01_sfnt_off000070ee.bin
8f76660a23753da0b38947699dc3dc6e01324f7dffe446bc647b5d9cc4c42189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70EE 10772 bytes
font_02_sfnt_off000095ac.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95AC 4324 bytes

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