Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebc699d3abe4d85…

MALICIOUS

PDF

41.7 KB Created: 2020-08-30 08:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1e8be5a0616dd8dd1fc35937ca1eac8 SHA-1: 0cf7688f858dbf5bb4c8da47b4e1f545f5747369 SHA-256: 7ebc699d3abe4d85b8aaec79ec46f57e751300408d4f70b8a98d920d2af99a78
152 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.ru/wix?keyword=sims+4+mid+century+modern'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The document body, though heavily obfuscated, contains references to 'Sims 4 mid century modern' and the malicious URL, suggesting a lure to a malicious site.

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.ru/wix?keyword=sims+4+mid+century+modern
    • https://static.usrfiles.com/ugd/1e32c2_2c7eec7a22a54cda9c5bf5a04e403cb6.pdf
    • https://static.usrfiles.com/ugd/544c7e_e27b864f3b184fc09c0c7f7983a60633.pdf
    • https://static.usrfiles.com/ugd/ca32a8_c8a33814fcd1431c89b5a9c8ae3e686f.pdf
    • https://cdn.shopify.com/s/files/1/0434/7209/3336/files/fogogavusokuzotetap.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4917/files/mavagox.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6636/files/53946469384.pdf
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/29667124547.pdf
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/mefazege.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86562581376.pdf
    • https://static.usrfiles.com/ugd/b8c837_b163dd7a12994e479ffc31d4ffef78a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4dd8bd25a5e492e891fe046cea3f4d5.pdf
    • https://static.usrfiles.com/ugd/36f25b_87f7faa9cf014a33a1aa2c124013f90b.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_off000066cd.bin
9ff3badd2b08ea1181b504c16829d47e33eeefbc8b13603e90e4ee7f39f378be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66CD 5136 bytes
font_01_sfnt_off0000782d.bin
1948decbf71a603b818801fac23d06b1d300fdbbf668382ec7cd3fbbd30f90af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x782D 10036 bytes

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