Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee107f66a5676d66…

MALICIOUS

PDF

57.9 KB Created: 2020-08-28 01:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db5d01fd2cd93b84a69c2d415bae3bd6 SHA-1: f1a6981f42bac56bbdf0b80a6dcde7b931308a61 SHA-256: ee107f66a5676d66134e1e77055dd567ac782d42371b33270a5cffbe0f178126
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body text, though partially corrupted, includes the URL 'https://ttraff.com/pify?keyword=summoners+war+guide', suggesting a lure to a malicious site disguised as a game guide. The ML classifier also strongly indicated maliciousness.

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=summoners+war+guide
    • http://wanebavu.sophiehirsh.com/uploads/1/3/1/4/131438137/b637cf22941ff.pdf
    • https://cdn.shopify.com/s/files/1/0427/4018/7303/files/lol_sylas_guide_german.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/xasag.pdf
    • https://cdn.shopify.com/s/files/1/0465/9373/6869/files/72251406679.pdf
    • https://cdn.shopify.com/s/files/1/0432/4062/0200/files/26396608179.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6834/files/midnight_castle_hidden_objects.pdf
    • https://cdn.shopify.com/s/files/1/0436/8403/6761/files/zuzumulufu.pdf
    • https://cdn.shopify.com/s/files/1/0441/0579/3688/files/a_river_runs_through_it_norman_macle.pdf
    • https://cdn.shopify.com/s/files/1/0432/1384/8731/files/hammerwatch_warlock_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/basics_of_networking_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/75935245353.pdf
    • https://cdn.shopify.com/s/files/1/0438/3218/0893/files/95094191432.pdf
    • https://cdn.shopify.com/s/files/1/0432/4062/0200/files/email_extractor_pro.pdf
    • https://cdn.shopify.com/s/files/1/0438/0377/1041/files/64356553971.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_off0000a521.bin
8eb178ff985a698a9c9a5978eea8c2d9f99ad7970f787e92a89653c9d6890245
pdf-font-stream PDF embedded font (sfnt) at offset 0xA521 5308 bytes
font_01_sfnt_off0000b716.bin
91bba83809df5830bffd5dde91da783c068eef9f4abd7e06970251a2bb916747
pdf-font-stream PDF embedded font (sfnt) at offset 0xB716 10440 bytes