Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59ac473e992b586…

MALICIOUS

PDF

57.4 KB Created: 2020-09-08 15:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f74c2043647309302362fa29fd3d3c7b SHA-1: d8013aef3a1ed7939540cad8363a502eba747352 SHA-256: a59ac473e992b586aee2e56286a97c97ff167174312fbd2fe11db71d35c40ccd
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to its inclusion of a link to a known malicious redirector, ttraff.link. The document also contains a large number of embedded links pointing to shopify.com, suggesting a link farm strategy. The presence of these links and the ML classifier's high confidence indicate a malicious intent, likely to redirect users to harmful sites.

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.link/pify?keyword=calibre+ebook+software
    • https://cdn.shopify.com/s/files/1/0462/8280/1312/files/nuritubeb.pdf
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/70751691243.pdf
    • https://cdn.shopify.com/s/files/1/0435/7862/2115/files/11376735356.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1138/files/masirugowujesitu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6199/1841/files/zimajopipiwisuzijef.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3592/files/kirby_air_ride_emulator.pdf
    • https://cdn.shopify.com/s/files/1/0435/7334/6472/files/2020_toyota_camry_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1268/files/10539283151.pdf
    • https://cdn.shopify.com/s/files/1/0438/5947/6630/files/fallout_4_companion_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/1980/4567/files/12249774336.pdf
    • https://static.usrfiles.com/ugd/07625c_d8c74df7496a4bb1a243b14a256c617b.pdf
    • https://static.usrfiles.com/ugd/05301a_a2067b618d92427989a690cb6687f7e6.pdf
    • https://static.usrfiles.com/ugd/9c58c5_d89d6d22454b4dfd89968da1a7ba15bb.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_off00009f0e.bin
797794bd7d4e3f9d74ca2f002b95b91138c4e4df6df2003f714f3c4ab25c0b92
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F0E 4960 bytes
font_01_sfnt_off0000b00c.bin
8358e8f8c67ff999a3302f7a7a4cd87dff0483a86db5530b5ff279c97426e521
pdf-font-stream PDF embedded font (sfnt) at offset 0xB00C 12664 bytes