Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ff3fd5d64637b6…

MALICIOUS

PDF

42.8 KB Created: 2020-08-29 10:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 091301d261cac8ab48bc1ecd6f6ea1ad SHA-1: af3fa462f5d4b5a2ae38606af07d662947515453 SHA-256: f5ff3fd5d64637b6a0e8481211109a4c547db7d4d6e72ea19832deeb9f9fece6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.cc/wix?keyword=star+wars+trivia+questions+and+answers+hard'. The document body, though heavily obfuscated, contains this URL and references to 'Star wars trivia questions and answers hard', suggesting a lure to disguise malicious intent. The presence of a link farm heuristic further indicates an attempt to distribute or redirect to 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.cc/wix?keyword=star+wars+trivia+questions+and+answers+hard
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/36856421475.pdf
    • https://cdn.shopify.com/s/files/1/0441/4488/5912/files/89408243498.pdf
    • https://cdn.shopify.com/s/files/1/0431/1010/5255/files/prozac_nation_young_and_depressed_in_america.pdf
    • https://cdn.shopify.com/s/files/1/0431/6135/4389/files/devos.pdf
    • https://cdn.shopify.com/s/files/1/0438/5947/6630/files/janudujibu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/46528225918.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/geladixegiru.pdf
    • https://cdn.shopify.com/s/files/1/0435/2363/7399/files/48908726019.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e7b5ca34de4477683cca469eae79e17.pdf
    • https://static.usrfiles.com/ugd/b8c837_cfe2ad1adfcd4f928cdced644920cae8.pdf
    • https://static.usrfiles.com/ugd/b8c837_78d6fa8d79c14cc48711ea3eae8d0953.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbd1b390e60e4e74af14b6be7255507b.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_off00006684.bin
7f3ebe636898a53a1f5b2be495981d7044cd5557b5400200b9c03d41a876dc40
pdf-font-stream PDF embedded font (sfnt) at offset 0x6684 5264 bytes
font_01_sfnt_off0000786e.bin
70b5c1841461bb1cde39328641d18db5e5bacdcdda73c3b2e5bc8599808d7001
pdf-font-stream PDF embedded font (sfnt) at offset 0x786E 11320 bytes