Malicious PDF — malware analysis report

Static analysis result for SHA-256 a445973c56adc961…

MALICIOUS

PDF

46.6 KB Created: 2020-08-11 02:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6146f4980dfd886bd57b135037a96eeb SHA-1: 9bc0b91e4cebe2ac16524c0577a01249bf7b225b SHA-256: a445973c56adc9613a479be0ecbe11b1320d56d0fa701278619ce5cb45127399
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.cc/pify?keyword=autocad+course+pdf+file', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Autocad course pdf file' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a visual download button heuristic further supports this phishing pretext.

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.cc/pify?keyword=autocad+course+pdf+file
    • http://vadogoka.olddonationband.com/uploads/1/3/2/3/132302782/72162f14.pdf
    • http://files.lowercreekcreations.com/uploads/1/3/1/4/131452887/1962873.pdf
    • http://files.lorraineeljuga.com/uploads/1/3/1/8/131860787/f217d2b0.pdf
    • https://cdn.shopify.com/s/files/1/0430/0685/3269/files/rusemobalajat.pdf
    • https://cdn.shopify.com/s/files/1/0431/1053/1238/files/22400356183.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/kukezasolalodal.pdf
    • https://cdn.shopify.com/s/files/1/0437/7745/8334/files/34325066469.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/ritoribipex.pdf
    • https://cdn.shopify.com/s/files/1/0431/6971/0242/files/50212521200.pdf
    • https://cdn.shopify.com/s/files/1/0452/4402/2944/files/arduino_uno_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0448/3717/5456/files/testing_the_validity_and_reliability_of_research_instruments.pdf
    • https://cdn.shopify.com/s/files/1/0445/3341/6095/files/kuxezosupowimigexuvuvik.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/90198628966.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/estructura_de_los_materiales_inorganicos.pdf
    • https://cdn.shopify.com/s/files/1/0433/4089/0262/files/vonelesojepakujat.pdf
    • https://cdn.shopify.com/s/files/1/0432/2538/3073/files/57234209283.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c3c.bin
bbd62af3fada84e0d934de2e238c87eeb30802cacb28790dbc50c262d0f74bf4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3C 4916 bytes
font_01_sfnt_off00007d03.bin
e94110160219e74259905fe92f2df5d2a05dbd1688e7c443f42136197933d9a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D03 10128 bytes
font_02_sfnt_off00009fb6.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB6 4324 bytes