Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3a79174ce318fe6…

MALICIOUS

PDF

39.6 KB Created: 2020-08-24 11:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6aa74b64c2579db3cce85609549c0ea4 SHA-1: 44145944000a6b2b404db9f57f8e0c2e85acdbf8 SHA-256: c3a79174ce318fe68c5125c41cb176d0296d979eccda3090165cb1922632d070
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=chaya+mat+chuna+question+answers'. This is further supported by a heuristic indicating a PDF link farm with numerous external links, many hosted on Shopify. The presence of a visual download button lure suggests a social engineering tactic to trick users into clicking the malicious link. The document body, though heavily corrupted, contains the malicious URL and references to PDF files, reinforcing the attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=chaya+mat+chuna+question+answers
    • http://files.behjatomer.com/uploads/1/3/1/8/131871705/bulatovegubal.pdf
    • http://files.fountainheadmuseum.com/uploads/1/3/0/8/130874647/ab5a2.pdf
    • http://files.tprrest.com/uploads/1/3/0/9/130968992/xitaxelulorakaveg.pdf
    • http://files.wingwoodfarm.com/uploads/1/3/1/4/131407164/wagigugodojas-powujiputafonu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7121/6542/files/50332308950.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/60263798513.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/22334629012.pdf
    • https://cdn.shopify.com/s/files/1/0448/1361/5264/files/microeconomics_theory_and_applications_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/9252/4700/files/fexuxasetosima.pdf
    • https://cdn.shopify.com/s/files/1/0437/0599/1322/files/black_mirror_season_1_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/atomic_habits_summary.pdf
    • https://cdn.shopify.com/s/files/1/0449/2630/4423/files/60925069801.pdf
    • https://cdn.shopify.com/s/files/1/0430/8133/4935/files/ncert_ka_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0458/0540/4326/files/95842625624.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/felepajol.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_off000058eb.bin
914517c3e0532b118d72e950df53244935da48094b741f672b5e3253c60fd1f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x58EB 5232 bytes
font_01_sfnt_off00006aaf.bin
58b5b028614740c4615cf3d271ee2cbe9c8086e51c1f7ce50532f72d6e793db0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAF 12240 bytes