Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d619e6c021f180…

MALICIOUS

PDF

40.9 KB Created: 2020-08-24 04:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32265683719997f09931f9cd5f69f6ea SHA-1: 958d01db54ad8b04174972fb91e8306929da39e3 SHA-256: f5d619e6c021f180027d3e8371610545ebe4b17c7a7e91f9b34ff00c7cfe5868
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, also contains this malicious URL, suggesting the primary intent is to redirect users to malicious content. The ML classifier strongly supports the malicious verdict.

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=walden+2+bf+skinner+pdf
    • http://dazusi.dogsontap.shop/uploads/1/3/1/6/131636881/ef6871cc.pdf
    • http://files.stephaniedesigns.net/uploads/1/3/1/6/131606502/ziviveziguxixevivut.pdf
    • http://files.littleladyo.com/uploads/1/3/0/9/130969004/furopigolijur.pdf
    • http://jobarubus.ballaghaderreengaaclub.com/uploads/1/3/0/7/130738970/xavigazumadolajupima.pdf
    • https://cdn.shopify.com/s/files/1/0433/4711/6197/files/fubegesesavalo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0941/files/way_of_the_cobalt_soul_monk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63491738983.pdf
    • https://cdn.shopify.com/s/files/1/0440/2737/9877/files/queen_gambit_declined_sadler.pdf
    • https://cdn.shopify.com/s/files/1/0433/1637/9816/files/lagoto.pdf
    • https://cdn.shopify.com/s/files/1/0438/9791/3512/files/pugobesuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/0999/1075/files/9340340235.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/lejetimi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/38055909817.pdf
    • https://cdn.shopify.com/s/files/1/0431/3903/9388/files/32706663154.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/16637860613.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/60146195638.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_off00006175.bin
c6741a9882997279f929af63d38e56ecca37d15a339bb329a812c452e2670dd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6175 5384 bytes
font_01_sfnt_off000073dd.bin
00f4ea39bbe10c16d3608c79a92f574977b5d45f6e2f0de05c20891a1ef0ac89
pdf-font-stream PDF embedded font (sfnt) at offset 0x73DD 10252 bytes