Malicious PDF — malware analysis report

Static analysis result for SHA-256 656df92607da4635…

MALICIOUS

PDF

37.0 KB Created: 2020-08-10 21:18:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c00994dd393f39322631de6fbdbbfb61 SHA-1: 783b0e695174718d2ca25f000e7d037cfe3e5f46 SHA-256: 656df92607da4635037e39614eb1335702e21aabd8e7b8a99e001843272c7bb8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to benign Shopify domains, but one critical link redirects through 'ttraff.cc', identified as malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to trick users into clicking it. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation or to host further malicious content.

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=harper+s+bazaar+uk+march+2020+pdf
    • http://duzajis.akanesensei.com/uploads/1/3/2/6/132682646/pijumobunoxixapavifo.pdf
    • http://files.ashleynicoleboydston.com/uploads/1/3/0/9/130969717/f8b8ee28e.pdf
    • http://files.kingbodies.com/uploads/1/3/1/3/131382470/4074469.pdf
    • http://files.melissamakesmoves.com/uploads/1/3/1/4/131437530/bafowuxilan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/lifozam.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/wanemapuzekuvo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/kerun.pdf
    • https://cdn.shopify.com/s/files/1/0441/1126/5944/files/2073453738.pdf
    • https://cdn.shopify.com/s/files/1/0437/4652/5338/files/ropavutadurewavo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9403/9975/files/php_show_all_images_in_folder.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/14723641166.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3383/files/5466291413.pdf
    • https://cdn.shopify.com/s/files/1/0430/8621/7383/files/fitikuzijigezaxevaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/6661/3141/files/aeronautical_engineering_subjects_list.pdf
    • https://cdn.shopify.com/s/files/1/0440/5490/4997/files/broiler_chicken_weight_chart.pdf
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/22528953703.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005136.bin
56c70e112654013b04f641d41d2719dcc3871585f561da7aea8551cdb09ec5bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5136 5852 bytes
font_01_sfnt_off000064fe.bin
5d8e739e531395026be611cbf32360c8dfb0e40f4573b22fa5d970e325c034cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64FE 10060 bytes

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