Malicious PDF — malware analysis report

Static analysis result for SHA-256 307c9f950cd9afb5…

MALICIOUS

PDF

51.3 KB Created: 2020-08-06 22:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d8d3ffeeaff31a538cfe27cf3f2b8bd SHA-1: 7440375c16b50c10b2468f2590354c07baa05be5 SHA-256: 307c9f950cd9afb5ee9cf67d7c7f598d3dfd7b601722a5da6de39b1191262e15
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=learn+russian+language+book+pdf, which is also listed as a malicious redirector. This suggests the PDF is designed to redirect users to malicious content, likely for phishing or malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=learn+russian+language+book+pdf
    • http://files.nathanpalmangus.com/uploads/1/3/1/4/131454304/sibineta.pdf
    • http://senoba.upatuga.org/uploads/1/3/1/4/131453284/3289730.pdf
    • http://files.spiralpathpilgrimages.com/uploads/1/3/1/3/131384718/mojogazotiv.pdf
    • http://files.beitnachum.org/uploads/1/3/1/8/131856666/digopujopepirok_bujuke.pdf
    • https://cdn.shopify.com/s/files/1/0435/8592/9375/files/the_nanny_season_1_episode_3.pdf
    • https://cdn.shopify.com/s/files/1/0429/6559/8364/files/9410284356.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/74662493206.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/prema_ishq_kaadhal.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/moleva.pdf
    • https://cdn.shopify.com/s/files/1/0428/4334/0956/files/12427718050.pdf
    • https://cdn.shopify.com/s/files/1/0431/7629/6614/files/cenarion_expedition_rep.pdf
    • https://cdn.shopify.com/s/files/1/0432/8062/9913/files/number_theory_and_geometry_an_introduction_to_arithmetic_geometry.pdf
    • https://cdn.shopify.com/s/files/1/0431/4077/6093/files/93120911626.pdf
    • https://cdn.shopify.com/s/files/1/0432/4383/1458/files/46210216394.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6741/files/marupijekizavugipid.pdf
    • https://cdn.shopify.com/s/files/1/0437/1080/8217/files/zuzuba.pdf
    • https://cdn.shopify.com/s/files/1/0428/2921/7958/files/35033484881.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_off00006d39.bin
a470a9b7d1a468c4ea0f94d0b8bbab96566c2c7b0bd1213f3c37f6afb2588682
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D39 5356 bytes
font_01_sfnt_off00007f80.bin
43ed5bf7e4dbb65032937462e440fd90588155030dfc6c979341c08c09ac4cd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F80 10200 bytes
font_02_sfnt_off0000a29c.bin
3c5f002989cbc34a52f2f538009abdee0e54a8ac795d6f1b328cbb53825366b6
pdf-font-stream PDF embedded font (sfnt) at offset 0xA29C 18576 bytes