Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7cc90b61b75389b…

MALICIOUS

PDF

40.3 KB Created: 2020-08-30 06:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f41c9aaebe55e15c0fc262695802732e SHA-1: f1f8f66312e94894ba229e45aef008b7f2cbff8e SHA-256: e7cc90b61b75389ba199fe418d5f4a7d4b476b584821ba6f9f26c6b8b57f2058
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to a 'photo release form california' and the malicious URL itself. The presence of numerous other links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content. No scripts were extracted from this sample.

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.ru/wix?keyword=photo+release+form+california
    • https://cdn.shopify.com/s/files/1/0434/2693/9042/files/27589486882.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/fosibakadajemoxemewim.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/24927543946.pdf
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/99239364255.pdf
    • https://cdn.shopify.com/s/files/1/0429/3758/1734/files/what_is_a._sh_file.pdf
    • https://cdn.shopify.com/s/files/1/0429/3879/4147/files/play_games_with_friends_iphone_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9662/files/18119043429.pdf
    • https://cdn.shopify.com/s/files/1/0437/7870/3518/files/lawifezi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/16679142427.pdf
    • https://cdn.shopify.com/s/files/1/0432/4645/2899/files/pathophysiology_of_heart_disease_book.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa32e7286ed54b8caacc51df05390803.pdf
    • https://static.usrfiles.com/ugd/b8c837_052f2125847e49058c83956fdea2c9cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_595645a606b9452192fa9041e802d36b.pdf
    • https://static.usrfiles.com/ugd/02beb7_dbdf7e67a5694e3485d0d96efe8c82f8.pdf
    • https://static.usrfiles.com/ugd/097bd5_332639d30eb244348af29b3e1c59619c.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_off0000597d.bin
de0f13efa1867193157031d89158a83d9ee81b2284ba2ead8578ea71dfbdcd84
pdf-font-stream PDF embedded font (sfnt) at offset 0x597D 5124 bytes
font_01_sfnt_off00006ac2.bin
768317f82c124d178c5ccd9a9439bace295d2be52f4d70f049397ab3339943ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC2 13116 bytes