Malicious PDF — malware analysis report

Static analysis result for SHA-256 702b5d611f92afe0…

MALICIOUS

PDF

66.5 KB Created: 2020-08-03 16:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87a1f5f488cce6ef780a43cdd5244a59 SHA-1: 8fb85ca5aeb9843f220d0eba42aba2d7cf5c41c9 SHA-256: 702b5d611f92afe0b47c7b6473d37508737e252b9cf4f452ff83ca302ac4d46d
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a link farm designed for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector, suggesting a phishing or scam attempt.

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=buckling+of+concrete+and+steel+columns+pdf
    • http://files.miamays.org/uploads/1/3/0/7/130739590/dasekopozov.pdf
    • http://files.audreylewisinteriors.com/uploads/1/3/1/3/131398174/veman-papaduve.pdf
    • http://files.valmalencoalpina.com/uploads/1/3/0/7/130738870/98bc027719b2d6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0718/8898/files/gufivewiwanavefubazabo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4189/files/16106505250.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/arch_linux_wireless.pdf
    • https://cdn.shopify.com/s/files/1/0431/5178/6135/files/ragesodajilisel.pdf
    • https://cdn.shopify.com/s/files/1/0430/1812/5465/files/central_alpherafs_com.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/28784986727.pdf
    • https://cdn.shopify.com/s/files/1/0434/5672/5153/files/giwijogoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/55758727870.pdf
    • https://cdn.shopify.com/s/files/1/0429/2830/8387/files/fajuxojebugubiguxepozun.pdf
    • https://cdn.shopify.com/s/files/1/0438/5813/3152/files/86465548927.pdf
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/wabobuwufadero.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/gebivaxivorajodudugu.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a69a.bin
b358e250e28722efda2ccafa7e7e55d175951299230982e81b7bebefc55e3ab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA69A 5588 bytes
font_01_sfnt_off0000b990.bin
5f838d129f1f2ba3ad909fabee980164f931b6ad39090c091bd05b5e23bb3bf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB990 14444 bytes
font_02_sfnt_off0000e7c6.bin
354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C6 16036 bytes

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