Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e40eae813921be1…

MALICIOUS

PDF

36.0 KB Created: 2020-08-30 21:14:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2621d15ad07005eb139fde44c7466515 SHA-1: dd882c90de499088f4a12ffa2deb514592677c36 SHA-256: 6e40eae813921be1a1571efede85d539bfe22bdcd113eb79ef5853ead8ba0551
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links to external PDF files, masquerading as search results for 'introduction to data mining tan pdf download'. One of the primary links, https://ttraff.cc/wix?keyword=introduction+to+data+mining+tan+pdf+download, is identified as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites or potentially distribute further malware. No scripts were extracted, but the embedded URLs and the heuristic firings strongly indicate a malicious intent to redirect users.

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=introduction+to+data+mining+tan+pdf+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0693/4696/files/56645313849.pdf
    • https://cdn.shopify.com/s/files/1/0432/4163/5997/files/61048799343.pdf
    • https://cdn.shopify.com/s/files/1/0435/2802/8312/files/sql_server_interview_questions_for_experienced_professionals.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6651/files/25719086246.pdf
    • https://static.usrfiles.com/ugd/b8c837_da713ef5824e4835ada86ddc9f8d35a9.pdf
    • https://static.usrfiles.com/ugd/6290de_5dd19b677e3448a78efecfe6a823e807.pdf
    • https://cdn.shopify.com/s/files/1/0431/0591/0935/files/gibaruxigupeniwuto.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6773/files/mabuzejijag.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_fce6ac47cd7c4a8fab8ee1b1230d314a.pdf
    • https://static.usrfiles.com/ugd/c068f8_54522a777d184767a7ba400cdcf8fe71.pdf
    • https://static.usrfiles.com/ugd/ae059d_c5d3465dbd5b4db7862a882fdd0e4d63.pdf
    • https://static.usrfiles.com/ugd/9f6a24_c16b3cc05c7b46a699be794dd3c9e380.pdf
    • https://static.usrfiles.com/ugd/9904c2_463ed88a0d114b34965d7f958ba36971.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f5b.bin
7e6f9f9ee839a79360993dab1e7f52abc67680ee92bcd3e0fec621fb08e07ed4
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F5B 5328 bytes
font_01_sfnt_off00006170.bin
570873a0fba3b05102c9a7a295e541ec10c5f3a271e580740dbdeb4bea10ed92
pdf-font-stream PDF embedded font (sfnt) at offset 0x6170 9936 bytes