Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a0787b496a417f…

MALICIOUS

PDF

50.8 KB Created: 2020-08-17 16:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9205b7401cc74faa1a72286eac18008 SHA-1: 3cc0e7a21ec9a8a94bfb9e58b6fbb0a7a6e95b88 SHA-256: f4a0787b496a417f1aa0fedb88f6e0fd1f0458f54c2994d7abbfdde0eb1715c5
152 Risk Score

Malware Insights

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

This PDF document is identified as malicious due to its inclusion of a link to a known malicious redirector, ttraff.ru, which is disguised as an investment guide. The document also contains a large number of external PDF links, many hosted on Shopify, which is indicative of a link farm designed to manipulate search engine results or distribute further malicious content. No scripts were extracted, but the primary malicious activity is the redirection to the identified malicious URL.

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=money+magazine+investor%2527+s+guide+2018
    • http://ranawenim.allykeast.com/uploads/1/3/0/8/130874493/8723875.pdf
    • http://kufepojip.desertliliesbazaar.com/uploads/1/3/1/3/131383483/84332.pdf
    • http://vigetav.esm-inc.com/uploads/1/3/0/9/130970004/tasexu_mofirak_bibopew_xekubala.pdf
    • http://bugizox.pcspetprojectofitaly.org/uploads/1/3/0/7/130738696/9151081.pdf
    • http://fiteve.mytajfashionincorporated.com/uploads/1/3/1/6/131636725/7459451.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/babape.pdf
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/club_car_wiring_diagram_36_volt.pdf
    • https://cdn.shopify.com/s/files/1/0434/6078/8390/files/36203507133.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/7863881010.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2460/files/mepawiki.pdf
    • https://cdn.shopify.com/s/files/1/0428/5333/5207/files/luzuxij.pdf
    • https://cdn.shopify.com/s/files/1/0437/1913/1285/files/english_language_teaching_approaches_and_methodologies.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/gukukotu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4899/files/mathematics_aptitude_test_questions_answers.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/siwedozukitarevipumuwore.pdf
    • https://cdn.shopify.com/s/files/1/0432/2269/6096/files/debaronozolomesolo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8059/8172/files/xawomuwakukega.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_off00008509.bin
4bfd1dc9fd68e30419f38d68cc008e157717fd857bc50b456304b0f9b953e6a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8509 5884 bytes
font_01_sfnt_off0000991e.bin
cb8634aeae5a10df4e13e97a67ecdc8e366c974408e4d3286876409e65b7c962		 pdf-font-stream PDF embedded font (sfnt) at offset 0x991E 10916 bytes

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