Malicious PDF — malware analysis report

Static analysis result for SHA-256 a66461f7708fd183…

MALICIOUS

PDF

36.8 KB Created: 2020-08-17 10:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a395df3eb1419339896c7a395237367 SHA-1: f3070dabd01b5d4ee3ac619f8d7e3aab91b97f8b SHA-256: a66461f7708fd183cc9e9fbe69849b09c4e744955f2ec309be21d8f5f53e5cf0
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). The document body, though partially corrupted, suggests a lure related to academic materials, specifically 'Phillips Exeter Academy Mathematics 2 Answer Key'. This indicates a likely phishing or malware distribution attempt, leveraging a link farm to obscure the malicious destination.

Heuristics 3

  • 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.
  • 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=phillips+exeter+academy+mathematics+2+answer+key
    • http://files.rootsofeducation.com/uploads/1/3/1/3/131380440/gides-lexaxegefojom-bigofijat-fipexetux.pdf
    • http://firorux.fbarhorses.com/uploads/1/3/1/8/131857315/4040258.pdf
    • http://xejezu.pinetreecottage.com/uploads/1/3/0/7/130739206/basum_gowakobev_gumesosonomazu_muxuvitijiso.pdf
    • http://gumaro.detailap.com/uploads/1/3/1/1/131164312/1423078.pdf
    • https://cdn.shopify.com/s/files/1/0434/7451/8178/files/busubimiroxevasogivu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/75814501486.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/92180925702.pdf
    • https://cdn.shopify.com/s/files/1/0432/4877/9426/files/beach_chairs_target.pdf
    • https://cdn.shopify.com/s/files/1/0429/5720/9753/files/resimuxiletal.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/gunisumikogokam.pdf
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/momusilamiwiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7418/2563/files/bangsamoro_organic_law_advantages_and_disadvantages.pdf
    • https://cdn.shopify.com/s/files/1/0440/8459/2805/files/ap_biology_campbell_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/jotirubapipigiguzisat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/basugogigarerebid.pdf
    • https://cdn.shopify.com/s/files/1/0432/0369/0660/files/how_to_make_a_directory_in_python.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_off0000503e.bin
9893e1211c49cb82a23a31480a792510722f24064b4e1eb6b55c304b3f2e8a24
pdf-font-stream PDF embedded font (sfnt) at offset 0x503E 5772 bytes
font_01_sfnt_off000063ca.bin
f570c130f6936b026f22a060a71dd652a8d620fc10996a8e0addf55421ec64dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x63CA 10072 bytes