Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a75ec24504b1243…

MALICIOUS

PDF

40.8 KB Created: 2020-08-30 22:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1dad40041a01cff8b4641d22074f97a9 SHA-1: 57c7b78717516b1e2a195bc6d4e7e10cf0bb8288 SHA-256: 0a75ec24504b124301735a7869c87f14b1698c625d6fb50fe0d4f089d7c8b3cb
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body also explicitly contains this URL, alongside numerous other Shopify links, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly flagged this PDF as malicious. The presence of a malicious redirector indicates an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=dj+khaled+new+album+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8575/8618/files/lejekugis.pdf
    • https://cdn.shopify.com/s/files/1/0449/1545/8215/files/anualidades_vencidas_y_anticipadas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2128194791.pdf
    • https://cdn.shopify.com/s/files/1/0431/4287/3249/files/galvanometer_into_ammeter.pdf
    • https://cdn.shopify.com/s/files/1/0435/3749/8271/files/sojatevuwuke.pdf
    • https://cdn.shopify.com/s/files/1/0463/6839/1329/files/before_midnight_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/putilalitate.pdf
    • https://cdn.shopify.com/s/files/1/0431/4130/0380/files/gavipiperavu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8135/8759/files/rudenotib.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7711/files/ridijawutevanokojobis.pdf
    • https://cdn.shopify.com/s/files/1/0432/1263/6322/files/kakifurufuvukebasojesu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2635/files/95535772713.pdf
    • https://cdn.shopify.com/s/files/1/0437/0667/9447/files/lilulepilurezobexogixim.pdf
    • https://cdn.shopify.com/s/files/1/0429/1212/0998/files/dejitonadinugukavira.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e60.bin
5b41cd05dfce2bf8ae4502af6c5ef3d3e9dfc39b29a029326f3133e090e5365b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E60 5340 bytes
font_01_sfnt_off00007070.bin
6400ab7dd660934c9fc17fb70d558782cd967b71829f31d84c11cf88aa1899f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7070 11308 bytes

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