Malicious PDF — malware analysis report

Static analysis result for SHA-256 836718b6d43bc68f…

MALICIOUS

PDF

60.3 KB Created: 2020-09-01 04:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d54e72fe98b1cf631309fa600d178812 SHA-1: 5453ec72e737443c99e9c4e4b2acacbe4d3595c5 SHA-256: 836718b6d43bc68fd8e9ddab870d61e34ae1bacd944273293a54a4b46d3da8b0
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/wix?keyword=canon+eos+1100d+video+format'. The document body, though heavily obfuscated, also contains this URL, indicating an attempt to direct users to a potentially malicious site. The presence of numerous PDF links further supports the idea of a coordinated effort to drive traffic to external 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/wix?keyword=canon+eos+1100d+video+format
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_dcc87629cb534cf2b9ec74ea4d011f03.pdf
    • https://static.usrfiles.com/ugd/7ef0dc_3a8a363a15f046168f9e244e2ce12eee.pdf
    • https://static.usrfiles.com/ugd/576447_38996dbdfe4144b59f7a6b7a35773fa7.pdf
    • https://static.usrfiles.com/ugd/b8c837_edb856a9c6ec4f37b96d4757c6fd5147.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e31b88086104db29415b86c1fade428.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/32302256235.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1641/files/xebowuxitunuzokodaposu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4487/2090/files/video_editor_ios.pdf
    • https://static.usrfiles.com/ugd/87d215_153996ad5e5c4beda743eb83a8a1280f.pdf
    • https://static.usrfiles.com/ugd/b8c837_344215e993c5403eb9505e7d16cfb44e.pdf
    • https://static.usrfiles.com/ugd/ee4a13_34c50de43f0a4dfd8f2020c0c5e59637.pdf
    • https://static.usrfiles.com/ugd/0dd040_0d7761346ba7460194ef15d7ade7b065.pdf
    • https://static.usrfiles.com/ugd/dc98cc_8ecb5022f50744ddaedd7bd85f8ffee5.pdf
    • https://static.usrfiles.com/ugd/b916f4_eba143238f104498866465378fcab6ef.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f3a53aed817421298ef206ac3598351.pdf
    • https://static.usrfiles.com/ugd/8b97dd_af61750f116449ecb8b8faf93a8f888d.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000b1ac.bin
1baf2cef8b38f779f0c3e779d37f2dc8b868095f37f1df51557f2d94afce8b42		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB1AC 28740 bytes
font_00_sfnt_off00007b22.bin
6c0ad5806b3afc3e03c377aec813a267eb7e7141b7dd4ade84b0dca2e7ac973f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B22 5180 bytes
font_01_sfnt_off00008cb6.bin
8a2f1ee35f1cebea3968d78dfbe8b264b7b363de4e9027399108eda04062cdd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB6 10748 bytes

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