Malicious PDF — malware analysis report

Static analysis result for SHA-256 b992e8d978ba294c…

MALICIOUS

PDF

54.4 KB Created: 2020-08-30 05:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9c2a73750b463335d5232f60a13baf4 SHA-1: e43caee9a21ad298a95e0762f3c0fb3c870e6285 SHA-256: b992e8d978ba294c29ff84187849c367461437a7574effb771526cf4c3be900e
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious sites. The document body, though heavily obfuscated, contains text related to 'urbini stroller instructions' and the malicious URL, suggesting a social engineering pretext. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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/wix?keyword=urbini+stroller+instructions
    • https://cdn.shopify.com/s/files/1/0437/6153/3085/files/47547061010.pdf
    • https://cdn.shopify.com/s/files/1/0428/8705/3471/files/71319266516.pdf
    • https://cdn.shopify.com/s/files/1/0440/5536/3734/files/pixisimow.pdf
    • https://cdn.shopify.com/s/files/1/0431/6469/6738/files/88788735981.pdf
    • https://cdn.shopify.com/s/files/1/0438/4181/4693/files/12969578915.pdf
    • https://static.usrfiles.com/ugd/b7306e_95020f25d65543af9d3d713855ec0961.pdf
    • https://static.usrfiles.com/ugd/63d3ad_9e9f53eefeef4e3d9ce33682ced74d0c.pdf
    • https://static.usrfiles.com/ugd/1decf9_3a9de94ce37a4d289b67daaaa82d385c.pdf
    • https://static.usrfiles.com/ugd/b444d4_bc3f14f960b9449cba2f0ff9b5bdacee.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a8e558f2e084f9bbdb3e8fb9e034ad9.pdf
    • https://static.usrfiles.com/ugd/912de2_3acb57fc1e51424c8376c21633d79015.pdf
    • https://static.usrfiles.com/ugd/271e65_666a8e6c0e094b71a4ea3d0e17401a18.pdf
    • https://cdn.shopify.com/s/files/1/0431/6892/3799/files/zatadufipezi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/kudozumazagomumoneposo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2952/7709/files/volvo_xc60_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008104.bin
cdcf235158d8d99a1c743f982631cf0275969e6cb1720b3f36aa265e63873eec
pdf-font-stream PDF embedded font (sfnt) at offset 0x8104 4596 bytes
font_01_sfnt_off000090ac.bin
c40fa3f35656f4c413e077c69bee357f65fa52f60d656dbe11696e08b24c74bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x90AC 14532 bytes
font_02_sfnt_off0000be81.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE81 4324 bytes