Malicious PDF — malware analysis report

Static analysis result for SHA-256 84a70e8ad6711010…

MALICIOUS

PDF

42.6 KB Created: 2020-08-16 15:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbcd71ca6aa642db20d1d8c4aab5dec0 SHA-1: 8bcf679a48095e0ae798c7b21e3c975e2fa47f6d SHA-256: 84a70e8ad6711010fe8e50c87cb604cda40726c70689239b8dea36a285306a75
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a manual and the malicious URL, suggesting an SEO poisoning or link farm attack. The primary intent appears to be redirecting the user to malicious infrastructure via the ttraff.com URL.

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/pify?keyword=bowers+and+wilkins+zeppelin+manual+espa%25C3%25B1ol
    • http://files.exploreyourjourney.com/uploads/1/3/2/7/132741225/zepigo-wejis-badatuxevewu-lonusame.pdf
    • http://xabuvobi.clclockport.org/uploads/1/3/0/9/130969953/102586ff5415.pdf
    • http://bujaxorov.mrexham.com/uploads/1/3/1/4/131405927/1720699.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/52340598466.pdf
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/retesakonevuteresawokaji.pdf
    • https://cdn.shopify.com/s/files/1/0430/1085/0979/files/medicinal_plants_in_vietnam.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6841/files/28113509219.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/23905614504.pdf
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/latiwunojewiwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5358/8390/files/toworixogavo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8940/2779/files/ocp_group_annual_report_2018.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_off00006566.bin
edf49f012a2c79849f520f446fe290638f9bf7871eef02bb7bc51d74f03c86c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6566 5572 bytes
font_01_sfnt_off0000781a.bin
6606867008e1abef6b312dfd0e90c1c6e5428c5e79e155c9ef40642b6c3b0332		 pdf-font-stream PDF embedded font (sfnt) at offset 0x781A 10212 bytes

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