Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f32df9cd38324be…

MALICIOUS

PDF

33.2 KB Created: 2020-08-05 02:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5ce35356d1b51d1a8fc39aee98d25d8 SHA-1: f99f75bc5fe19d300e57cd4a2a9aa834d2a8ab30 SHA-256: 3f32df9cd38324be0ed8931015953e3c32f2ba6763308252268191ef3546f2df
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a free book download. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic fired, pointing to `https://ttraff.com/pify?keyword=the+illusion+of+life+disney+animation+book+pdf+free+download`. The document body also contains this URL, reinforcing the lure. The PDF also hosts a large number of external links, many pointing to Shopify domains, which is characteristic of SEO link farm abuse.

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/pify?keyword=the+illusion+of+life+disney+animation+book+pdf+free+download
    • http://files.cornerstonepie.com/uploads/1/3/1/4/131453944/xivomuzejaloxeto.pdf
    • http://files.greenmountaingrills.co.uk/uploads/1/3/0/8/130813888/wofozojarobome.pdf
    • http://files.superiordesignshairsalon.com/uploads/1/3/1/4/131437530/b2ad49badd8176.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/alcohol_and_diabetes.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1862/files/57530538617.pdf
    • https://cdn.shopify.com/s/files/1/0433/2807/7992/files/bukalozu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8174/1976/files/compex_electrode_placement.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7660/files/59287212009.pdf
    • https://cdn.shopify.com/s/files/1/0429/4718/2759/files/12206532261.pdf
    • https://cdn.shopify.com/s/files/1/0436/2030/3011/files/electricity_little_alchemy.pdf
    • https://cdn.shopify.com/s/files/1/0434/4479/7607/files/calculus_by_thomas_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0226/files/27823362987.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kexuxedixu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7364/2389/files/80397614828.pdf
    • https://cdn.shopify.com/s/files/1/0431/8933/8276/files/30850391788.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_off000044b2.bin
cd0efaf73b74d63d2e80714651266ed3b4c6c74cfd4b2655b61ae6b9ca0ba32b
pdf-font-stream PDF embedded font (sfnt) at offset 0x44B2 5628 bytes
font_01_sfnt_off000057b8.bin
779b7316ae473d3d1dcc6c33e941428643ce4c7700cfa40b27c7068c34a1c0b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x57B8 9304 bytes