Malicious PDF — malware analysis report

Static analysis result for SHA-256 60bff57d572d5c3a…

MALICIOUS

PDF

64.5 KB Created: 2020-08-01 21:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 305a8530982f94b977fabbbd85deecfc SHA-1: 89111b5f756b6d478860691cfe88563ef7b81947 SHA-256: 60bff57d572d5c3ab17744ede1aa72b7040a386af2436b27c41949142e695cf7
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body, though heavily obfuscated, contains a reference to the same redirector URL. The presence of a large number of external links suggests an attempt to distribute malicious content or engage in SEO link farming to improve search rankings for malicious sites.

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/pify?keyword=managerial+accounting+5th+edition+pdf
    • http://files.karate-ilford.com/uploads/1/3/1/8/131872178/8492483.pdf
    • http://files.wilson-pto.com/uploads/1/3/1/6/131637649/7412474.pdf
    • http://files.highschooldevelopmentleague.com/uploads/1/3/1/4/131437827/kififo_matof_kapabuki_tuxop.pdf
    • http://files.tnsportsfoundation.org/uploads/1/3/0/7/130740165/0dcf05b78f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/8865/7051/files/6324308589.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/volobufepafolosovi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/xiwifuremigixuwu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vemuvuferakodumi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2805/4169/files/45677706592.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0300/files/69908062984.pdf
    • https://cdn.shopify.com/s/files/1/0430/8212/1377/files/jonosisaviru.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1511/files/semokigugapimobibi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/xolenomexesinademexom.pdf
    • https://cdn.shopify.com/s/files/1/0436/0175/6323/files/indian_names_male.pdf
    • https://cdn.shopify.com/s/files/1/0432/7034/0772/files/21519843261.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/butunimopijurukodexona.pdf
    • https://cdn.shopify.com/s/files/1/0429/7143/1065/files/nusubilabixule.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a53d.bin
ab60923fba82dd2be7fd060632d9c5651288e2553b8e3500e0c3eb400aeb578f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA53D 5248 bytes
font_01_sfnt_off0000b70e.bin
ec8109eb5df9de1dc55a2f91a7b29d0a09e5a5cdf38de9b59f10abad4a193056		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB70E 14924 bytes
font_02_sfnt_off0000e61e.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE61E 4324 bytes

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