Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ef173e3fa01ee3b…

MALICIOUS

PDF

41.6 KB Created: 2020-08-29 08:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edec46f2719493a2429c1960341909fa SHA-1: 6818770b2a100677dca00bd61bd6e51ffe15bbd4 SHA-256: 3ef173e3fa01ee3b78f4a8579bedefe084f386885386ae04472ff81e9f3b7d35
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify domains. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to lure users to this redirector.

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.com/wix?keyword=value+investing+made+easy+janet+lowe+pdf
    • https://static.usrfiles.com/ugd/b8c837_b2703d6f23054d5e99f2ec4970135d8d.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d1d4311fb914efbb28328a453795686.pdf
    • https://static.usrfiles.com/ugd/b8c837_c24447d30b8c47828084a64ed750a70b.pdf
    • https://cdn.shopify.com/s/files/1/0432/8869/0844/files/lebakovabogese.pdf
    • https://cdn.shopify.com/s/files/1/0438/9673/3864/files/48965374778.pdf
    • https://cdn.shopify.com/s/files/1/0436/6345/8457/files/57688582276.pdf
    • https://cdn.shopify.com/s/files/1/0429/2070/6204/files/55383658874.pdf
    • https://cdn.shopify.com/s/files/1/0433/7539/4977/files/dewunawavuza.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c5ba7c84fd74f85ab0867e590cdab2d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a14133b86e6c4c48aacd8f58d137055b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ced2341c80824d679035246068134392.pdf
    • https://cdn.shopify.com/s/files/1/0428/9226/3583/files/relolukida.pdf
    • https://cdn.shopify.com/s/files/1/0435/2599/6698/files/money_calling_music_video.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_off00004d3d.bin
a0230e5059ab7a2752ec220fb6bcdabbba94ff77211ca5b4cdb70f45c4d6bd09
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D3D 5560 bytes
font_01_sfnt_off0000603e.bin
de20122081e2caa8160b86ec2923758c6227ac90fdf896c06913c4dde1f492dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x603E 10268 bytes
font_02_sfnt_off000082df.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
pdf-font-stream PDF embedded font (sfnt) at offset 0x82DF 16092 bytes