Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5aee0c1e77ea9e4…

MALICIOUS

PDF

57.8 KB Created: 2020-08-04 14:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a31eee01a44edf4aa948480a3c8511bf SHA-1: 890121d486dbe0df2324e9c8f54a71adcc329d80 SHA-256: d5aee0c1e77ea9e4e7c0e8298022cf2859d8be99061287c07bce422a7a320e62
150 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 of which point to a link farm infrastructure. The primary malicious redirector URL is https://ttraff.cc/pify?keyword=chacha+chaudhary+pdf, which is likely used to obscure the final destination of the malicious payload. The ML classifier strongly indicated maliciousness, and the presence of a link farm is a common tactic for distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=chacha+chaudhary+pdf
    • http://files.wfshootout.com/uploads/1/3/1/3/131383823/majajojamobu-ligunazijefa-marapotu.pdf
    • http://files.stakeranimalcremations.com/uploads/1/3/1/4/131437064/piforofegore.pdf
    • http://files.projectyouthaffirm.org/uploads/1/3/2/8/132814166/gadumotev.pdf
    • http://files.mirrorsofgodslove.org/uploads/1/3/1/4/131483138/jokaz-diwuve.pdf
    • https://cdn.shopify.com/s/files/1/0432/8508/6364/files/wavabidodoxolirazuraxudiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/94840098629.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0309/files/pojasumobafekatunugas.pdf
    • https://cdn.shopify.com/s/files/1/0435/6889/0015/files/72670272892.pdf
    • https://cdn.shopify.com/s/files/1/0435/0692/5720/files/barcelona_metro_map.pdf
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/environmental_science_merit_badge_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0435/1298/7802/files/27811453390.pdf
    • https://cdn.shopify.com/s/files/1/0430/8615/1833/files/37285010143.pdf
    • https://cdn.shopify.com/s/files/1/0439/5122/7038/files/22550722428.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8152/files/75649730490.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/43320533188.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/59735356608.pdf
    • https://cdn.shopify.com/s/files/1/0435/2131/0880/files/28810769205.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_off00008265.bin
703096bf1e9ad8ef4e721ed64e5001509515421737362bfb702167f719856c20
pdf-font-stream PDF embedded font (sfnt) at offset 0x8265 5040 bytes
font_01_sfnt_off00009388.bin
de85ce6de93c01e41f7b80837dd0b59c3661e05791f1e28dfa41570c08f70d53
pdf-font-stream PDF embedded font (sfnt) at offset 0x9388 11728 bytes
font_02_sfnt_off0000b799.bin
38f9c5afc0389437b869c48fee6e3dcb0ec2dc2737449ad12b82c4e92f101393
pdf-font-stream PDF embedded font (sfnt) at offset 0xB799 10120 bytes