Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b10011c28f482ab…

MALICIOUS

PDF

44.0 KB Created: 2020-09-01 20:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e294b29e34a1f71a3f9f0491bc4b9247 SHA-1: b12b12d8d264b27ac09613b89afea430c0cbc604 SHA-256: 4b10011c28f482ab2bcf4aa4c511ef0ea9bc2e8914becd3e631751f6a5a47d7c
154 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 'https://ttraff.cc/wix?keyword=blockman+multiplayer+for+minecraft+pc'. This URL is embedded within the document body, suggesting an attempt to trick the user into clicking it. The presence of a large number of external PDF links, many hosted on static.usrfiles.com, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the ultimate destination. The ML classifier also strongly flagged this PDF as malicious.

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.cc/wix?keyword=blockman+multiplayer+for+minecraft+pc
    • https://static.usrfiles.com/ugd/87b9a8_faad08522f1e4043b4387dec9d23d951.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_3b8c1442e73047c2a8cc3db605e83540.pdf
    • https://static.usrfiles.com/ugd/cf14a4_f6c13f1452b84b10b99c3150e964d108.pdf
    • https://static.usrfiles.com/ugd/b7ab08_0b76597a85a345a7a411311a17227300.pdf
    • https://cdn.shopify.com/s/files/1/0436/1447/0302/files/fidewi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/zubatufuxemugofowit.pdf
    • https://static.usrfiles.com/ugd/b8c837_79498a9681a742d5ad474c77ba802910.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf389887f0244118b4bec65dfc8c4ee2.pdf
    • https://static.usrfiles.com/ugd/10b11f_306249b133ee4cfda7e20587507a4a89.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_f236f4a25659408b8ceb35e96ebc7c6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0ad4987847744cd9d878a83d8b35a12.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69865881622.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/73961991885.pdf
    • https://cdn.shopify.com/s/files/1/0430/5063/1319/files/29061273686.pdf
    • https://cdn.shopify.com/s/files/1/0461/9534/3510/files/lepatigijilusivawomirawiv.pdf
    • https://cdn.shopify.com/s/files/1/0439/3045/2123/files/76211189802.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_off00006cb8.bin
5014c52ea9d4212f3ae338b46b3a2a092731d6e851fba4be60de3d360859d19b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB8 5196 bytes
font_01_sfnt_off00007e60.bin
d8e65473a6c6332a0344285893b0b42825c733643d2377f963edf71c3ad52dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E60 10692 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.