Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a26653b9ba90487…

MALICIOUS

PDF

36.0 KB Created: 2020-08-11 03:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11ad37b4c1ad9abd721e87bdc1b53edc SHA-1: 10769bcc53d049b9dce9bf8121f5b4d7208cd81b SHA-256: 1a26653b9ba90487d9f2ac437727c52061750fe90e5edd167520b80288065814
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to appear as search engine results, with the primary malicious link redirecting to `https://ttraff.cc/pify?keyword=blender+guru+hotkeys+pdf`. This URL is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and several other Shopify links, suggesting a social engineering lure to drive traffic to malicious infrastructure. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or redirection attack.

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/pify?keyword=blender+guru+hotkeys+pdf
    • http://files.trigintaoptimi.org/uploads/1/3/2/7/132710694/9423837.pdf
    • http://files.graceandfaithboutique.net/uploads/1/3/0/7/130739490/507ed.pdf
    • http://files.avrnv.org/uploads/1/3/1/4/131437246/tugopimep.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/27401354336.pdf
    • https://cdn.shopify.com/s/files/1/0433/2178/6521/files/kobumixulezapa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wuwikeg.pdf
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/bob_marley_jamming.pdf
    • https://cdn.shopify.com/s/files/1/0436/9947/0486/files/teamviewer_commercial_use_detected.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1512/files/kexobunozisimegupowi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/79776150519.pdf
    • https://cdn.shopify.com/s/files/1/0434/9237/6741/files/capital_punishment_in_the_united_states.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70934180934.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9504/files/mepazen.pdf
    • https://cdn.shopify.com/s/files/1/0437/3564/6357/files/68202933751.pdf
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/aberdeenshire_council_school_holidays.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_off00004a3d.bin
7db076e61bb98bb10efe116c05b9d922924b61c09215f733b38078a24320508d
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A3D 5308 bytes
font_01_sfnt_off00005c54.bin
85a56a6997fcbc10949aac32334c6a578b7f367a4d10cb22d234b9141d5dcdc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C54 12012 bytes