Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a5ccbb74abc22e4…

MALICIOUS

PDF

40.2 KB Created: 2020-08-03 18:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30698279a5e0147a57aa53406f6cf4e9 SHA-1: a63cce685df2cd94c17044ca08ab5b4292cc4c5a SHA-256: 3a5ccbb74abc22e4d449b2cfb6ab66dbe3edc12697bbde14ab46915dcf08bc2f
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, disguised with a search query related to 'bangladesh baggage rules 2015 pdf'. This heuristic, combined with the ML classifier flagging the PDF as malicious, strongly suggests a phishing or malware delivery attempt. The document body itself contains the malicious URL and numerous other URLs hosted on cdn.shopify.com and other domains, likely part of a link farm to improve search engine visibility for malicious content. No scripts were extracted from this sample.

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/wb?keyword=bangladesh%20baggage%20rules%202015%20pdf
    • http://files.milegion-legacyrun.org/uploads/1/3/0/9/130969435/8949082.pdf
    • http://files.integralcatalyst.com/uploads/1/3/1/4/131453934/80090303c881.pdf
    • http://files.melissabowmanward9.ca/uploads/1/3/1/6/131637881/9ef7a28.pdf
    • http://kuguvuvun.ogepta.org/uploads/1/3/0/8/130874232/28bd791d.pdf
    • http://files.heavygrail.net/uploads/1/3/1/3/131380733/bitat.pdf
    • https://cdn.shopify.com/s/files/1/0436/4645/1862/files/10974400036.pdf
    • https://cdn.shopify.com/s/files/1/0432/1384/8731/files/27841960107.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/wafowiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/9740/7126/files/pojufowijusurawademo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1116/8664/files/50581284494.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/lodedivozajefigu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/93026198949.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/ryobi_c430_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/7581/4047/files/lopurokibeteku.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/warcraft_3_patches.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/deligoxedes.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/install_mac_os_sierra_on_virtualbox.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e64.bin
c1ed3bba7dcd7a811713a07ad4ffe4567756ea9b8d5d572799a4b5e29bccfa9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E64 5944 bytes
font_01_sfnt_off00007298.bin
ca76d6cd6096f3db6e9cf26504dee85312fac38c5cbc3f97ea377699a3682b7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7298 9680 bytes

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