Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c8f3361725be0eb…

MALICIOUS

PDF

71.3 KB Created: 2020-08-01 16:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 290c0f9fef520c700bf039cb6981d6a7 SHA-1: 7ddb4bb687e2ca8ba8ad8fb3465f6ee6b18b745b SHA-256: 9c8f3361725be0eb5ef4bce3c2d35a3380b4b59785df5f52b32c7f36a4a8ebde
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The embedded URL 'https://ttraff.ru/pify?keyword=verizon+moto+e+unlock' is a strong indicator of malicious intent, likely leading to a phishing or scam page. The document body, though heavily obfuscated, also contains this URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm used for SEO manipulation or to obscure the final malicious destination.

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=verizon+moto+e+unlock
    • http://files.emmapullar.com/uploads/1/3/0/7/130740212/nakubikojoba_nejabej_roxugedifulimob_wetomatupukuv.pdf
    • http://files.peterkimpeterkim.com/uploads/1/3/0/8/130814172/wewufuvofugasa-toxiduva-muwowesekafefa-tevaputu.pdf
    • http://files.downsyndromejunction.com/uploads/1/3/2/6/132695329/kivosazug.pdf
    • http://files.cometsbaton.com/uploads/1/3/2/6/132681164/xifuvonaretamodegaja.pdf
    • http://files.wilsoncreekkennelsllc.com/uploads/1/3/1/6/131606875/jubimabulofud_wegopuruleledi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8472/6943/files/24635214940.pdf
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/kamow.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dazekenikajupupapunel.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/muworatevu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/momitejamijen.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5957/files/60448782677.pdf
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/7837885708.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/96900502735.pdf
    • https://cdn.shopify.com/s/files/1/0432/4891/0498/files/81920880415.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/pabimutosu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/31749919357.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_off0000d0cb.bin
35897044e38438ce219a5cc174a24f421105dde0145259644ec25b238a0397f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CB 4636 bytes
font_01_sfnt_off0000e08c.bin
cf10aefb613b7b143ad79b12de99e5e8ed1950c85761161caeb27fcee94f4298		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE08C 15080 bytes

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