Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e166f16c348f973…

MALICIOUS

PDF

61.1 KB Created: 2020-09-01 00:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: baa43a296e03afa96b75f4be29674390 SHA-1: 7a8e81e54ad80502f3e3af53ebc43c02322132ba SHA-256: 4e166f16c348f9732b247683bab25de0d8a6e9a4f6422ec1475132a1e28bd240
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=directv+sports+guide+printable'. This URL is presented within the document body, disguised as a printable sports guide. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on cdn.shopify.com. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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/wix?keyword=directv+sports+guide+printable
    • https://static.usrfiles.com/ugd/6924eb_989b5919ac13421492b03458a0a2aab5.pdf
    • https://static.usrfiles.com/ugd/c1108c_c0b837cd688d457690d26b2bbaea0cce.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d26706714284b4f9fb624b41232f538.pdf
    • https://cdn.shopify.com/s/files/1/0431/0152/0029/files/15199244989.pdf
    • https://cdn.shopify.com/s/files/1/0434/3349/2641/files/conceptual_physics_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/vewetaro.pdf
    • https://cdn.shopify.com/s/files/1/0441/1044/6744/files/bonfiglioli_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30549310566.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7616/files/eecs_126_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/65363172265.pdf
    • https://cdn.shopify.com/s/files/1/0435/6639/9647/files/mike_and_molly_episodes.pdf
    • https://static.usrfiles.com/ugd/ee6770_d34c2f2a0d6c4dc1b01f06b4c3b16ad3.pdf
    • https://static.usrfiles.com/ugd/b8c837_538721c2a6c542a3807f4fcdeba1b002.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_640dd394fe394f569b133d2b58fe969f.pdf
    • https://static.usrfiles.com/ugd/6c032c_bfdbcca575f3471b98d0fb164b40410a.pdf
    • https://static.usrfiles.com/ugd/63d3ad_799bfd6642704c9bbbfc77c2199ef0e8.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_off00008e6f.bin
b724884560bd8f7b095192e83028d22e51e1b85dfebefea2d821881ffa5b8d97
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6F 5440 bytes
font_01_sfnt_off0000a104.bin
509c7b17a2dbd64a06af48c22c529c80486674f09e8f41a1ae77d3f2a95c5e8f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA104 15540 bytes
font_02_sfnt_off0000d128.bin
ff5e514e1c11c2125cdc4861327fbbae27187b93872798b43385f1a7ee0b5908
pdf-font-stream PDF embedded font (sfnt) at offset 0xD128 16348 bytes