Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ddf8f02635de89…

MALICIOUS

PDF

42.2 KB Created: 2020-08-14 02:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3c9465eadad8158c92eac8845b69763 SHA-1: 347c10f218585f599fbd33a69eca8b69c9b755a2 SHA-256: 94ddf8f02635de89b5d73f17fe89b3048b3a303b1ff1852c6412a9a5e6afa6cf
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.ru/pify?keyword=2014+dinghy+tow+guide, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and appears to be a lure related to a 'dinghy tow guide'. The presence of numerous other links to Shopify PDFs suggests a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted from this sample.

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=2014+dinghy+tow+guide
    • http://files.pamelaabrown.com/uploads/1/3/0/8/130814623/3635402.pdf
    • http://powozika.sonjasweetphotography.com/uploads/1/3/0/7/130738796/1936964.pdf
    • http://files.mrohagan.com/uploads/1/3/0/7/130775354/vanutaluj.pdf
    • http://files.hrcesocialstudies.ca/uploads/1/3/1/4/131453432/3132968.pdf
    • https://cdn.shopify.com/s/files/1/0440/1594/3845/files/siwawagepab.pdf
    • https://cdn.shopify.com/s/files/1/0429/0940/1254/files/26368287031.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1245/files/bureaucratic_theory_max_weber.pdf
    • https://cdn.shopify.com/s/files/1/0429/3145/4119/files/fssai_answer_key_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/9094/2888/files/gavufufamevil.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/54391794486.pdf
    • https://cdn.shopify.com/s/files/1/0440/8855/7718/files/southwest_airlines_flight_schedules.pdf
    • https://cdn.shopify.com/s/files/1/0438/1927/0301/files/kunozagesagekunofusom.pdf
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/jenaze.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/meragavafeduxilaxopuxaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/6192/7318/files/32863578068.pdf
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/81029322786.pdf
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/56358198972.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/ranamisaravuroberavom.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_off00005b78.bin
3dc95c9a7bb43269f2a90863084397cd84c8ec6ca153caca9b5fe35296fe5189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B78 4964 bytes
font_01_sfnt_off00006c6e.bin
8c8bae6ef0f51b03b25e28fe1fee85006f47e1f358bee14181b6e1a840643eb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6E 9668 bytes
font_02_sfnt_off00008d99.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D99 4324 bytes

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