Malicious PDF — malware analysis report

Static analysis result for SHA-256 20367b2add095d67…

MALICIOUS

PDF

49.8 KB Created: 2020-08-26 08:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1dd1fd806061d92233f19cb883ee3d31 SHA-1: b426cfa40d4c41f34eb3a5ed31f068773ba8e856 SHA-256: 20367b2add095d671d4403866ae3cc7027c7c53396eb05dbbf3f45916aeaba21
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a critical redirector link to 'ttraff.com', indicating a malicious intent to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains the same book title as the redirector URL, suggesting a lure. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to malicious infrastructure via embedded 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.com/pify?keyword=john+maxwell+5+levels+of+leadership+book
    • http://files.shenandoahpermaculture.com/uploads/1/3/1/4/131407164/negusibamosoriv_xofajekepa.pdf
    • https://cdn.shopify.com/s/files/1/0437/4976/9367/files/obstructive_sleep_apnea_anesthesia_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0428/4828/8934/files/bopuwiwopafiluzujagov.pdf
    • https://cdn.shopify.com/s/files/1/0430/8634/8450/files/96791779890.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/empyrion_auto_miner.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1296/files/69147612327.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/rerezuputiti.pdf
    • https://cdn.shopify.com/s/files/1/0429/3296/1443/files/workbook_template_design.pdf
    • https://cdn.shopify.com/s/files/1/0428/8072/9251/files/katalog_kabel_supreme_nyfgby.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/39943374144.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/73127609828.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jatud.pdf
    • https://cdn.shopify.com/s/files/1/0432/3206/7748/files/5e_ranged_attack.pdf
    • https://cdn.shopify.com/s/files/1/0431/6767/8618/files/big_ideas_simply_explained_science.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_off000082f8.bin
908ba8a9ed8c55f868f77a10260c02fd261b0de63f3963ced380dd0a5893728d
pdf-font-stream PDF embedded font (sfnt) at offset 0x82F8 5816 bytes
font_01_sfnt_off000096af.bin
06be2243ea187e9c30f684c4b58f4ae693fb98e00038998beb3223dc79d7e5e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x96AF 10300 bytes