Malicious PDF — malware analysis report

Static analysis result for SHA-256 b894fb42f6e17b28…

MALICIOUS

PDF

44.9 KB Created: 2020-08-08 06:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e1b8348b893af53dbd39bc55b2f2377 SHA-1: 1bae38cd007a2efa4c161e66aa74aa03506fec73 SHA-256: b894fb42f6e17b286435adb2059cdb3424f946d8159f4ee7b6f93b1f1fcadc51
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The document body also contains numerous links to external PDFs hosted on various domains, suggesting a link farm or SEO poisoning tactic. 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 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.cc/pify?keyword=welding+brazing+and+soldering+pdf
    • http://files.bethelumcsi.com/uploads/1/3/1/0/131071256/buzejanavazewe.pdf
    • http://bogul.dandelionsandlove.com/uploads/1/3/0/8/130874254/7cbdaf7bb98.pdf
    • http://kitab.goldensamurai.net/uploads/1/3/1/6/131637254/puloxodetimebizo.pdf
    • http://puporilun.apaveeperspective.com/uploads/1/3/1/4/131407511/ronujaxujigak_fubon_bezitepa.pdf
    • http://goduti.adviceandexperiencescheme.com/uploads/1/3/0/8/130814238/zegimubogi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2960/files/st_thomas_weather.pdf
    • https://cdn.shopify.com/s/files/1/0433/7811/4727/files/89531775774.pdf
    • https://cdn.shopify.com/s/files/1/0432/8813/3787/files/number_pattern_solver.pdf
    • https://cdn.shopify.com/s/files/1/0428/4828/8934/files/xikururojitaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/8998/3643/files/james_stewart_calculus_8th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0430/8104/0033/files/kepuvazuvodiforisuruzuli.pdf
    • https://cdn.shopify.com/s/files/1/0437/9423/5553/files/zesezu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3902/3526/files/definition_of_dispute.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/50419821330.pdf
    • https://cdn.shopify.com/s/files/1/0430/7353/6149/files/dewedusuxig.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/kejavike.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_off00006670.bin
729beac2fccb36369c639d2f033322da8383d6f3e0a7c7e774e1c531500e1021		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6670 5120 bytes
font_01_sfnt_off000077e3.bin
40f1d0bd5f6aaf2709725dd0dd9dd06ae66c0f1884834a46561fab6c5c538bfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77E3 9488 bytes
font_02_sfnt_off0000984d.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x984D 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.