Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde996b27d1d6680…

MALICIOUS

PDF

68.2 KB Created: 2020-08-20 06:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d544e956d6fbca081f112a239f27f83b SHA-1: 92eb12827e42c6d92f1ef51591da6cb2194c27d0 SHA-256: fde996b27d1d66804cfb40a2bb47636c5d30c8c0ea23f93fe283c3249859996f
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to its inclusion of a link to a known malicious redirector, ttraff.cc. It also contains a large number of external links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The document body, though heavily obfuscated, contains the same redirector URL. The primary attack pattern involves luring users through deceptive content to click on malicious links.

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=bal+ganesh+telugu+songs++mp4
    • http://files.smokefreebyattrition.com/uploads/1/3/1/6/131637658/45adb6b.pdf
    • http://lanevodo.annualgolf.com/uploads/1/3/0/8/130814328/1581105.pdf
    • http://lesomuje.bushkillumc.com/uploads/1/3/0/7/130775376/79068.pdf
    • http://files.smenospublications.com/uploads/1/3/0/7/130740217/6044508.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2323/files/securecrt_portable_x64_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/didevu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xasojikunu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7424/8101/files/4136797025.pdf
    • https://cdn.shopify.com/s/files/1/0440/4084/7510/files/bhoot_ki_darawni_awaz_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0432/5353/0782/files/tesuxipaxexorojupu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6788/1125/files/3564232039.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/13591047575.pdf
    • https://cdn.shopify.com/s/files/1/0435/5630/7107/files/the_short_oxford_history_of_english_literature_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/46029771306.pdf
    • https://cdn.shopify.com/s/files/1/0431/4405/2898/files/98240256162.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a06d.bin
beae53a4457592ec611762ca8cc8e7fb12c61c2c9265e3a2793991ba21fed48e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA06D 5276 bytes
font_01_sfnt_off0000b236.bin
1ba05a4bec3a9a444f48650b4153c0c2f47e11e528055d4e007897a62ab3b698		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB236 3868 bytes
font_02_sfnt_off0000c120.bin
412e90b830aefbcaf072a766ac650131860ab2e9ee5d91d8ecdb36afe8ffdc2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC120 13700 bytes
font_03_sfnt_off0000ec90.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC90 16092 bytes

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