Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbdf65d9b74fe401…

MALICIOUS

PDF

50.4 KB Created: 2020-07-27 20:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3beb6dc250cc0a5151db341879267994 SHA-1: 8148e1b04875789f4cc6e4439212735629392f04 SHA-256: dbdf65d9b74fe401ba9164ff9dd2ecc61da9a78c2a67a3e958c3bcbd025663f9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The document body, though heavily obfuscated, suggests a lure related to 'Gay chat app for android', potentially a social engineering tactic. The presence of a payment redirection lure heuristic further supports the conclusion that this PDF is designed to trick users into clicking malicious links.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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=gay+chat+app++for+android
    • http://files.eatnoodlehub.com/uploads/1/3/0/7/130740013/melowep.pdf
    • http://files.asdontheroad2019.org/uploads/1/3/2/7/132712661/lejozugezite.pdf
    • http://files.rajpurohit-lab.org/uploads/1/3/1/4/131453268/dirubude_jagifoles_lagunedetido_wubog.pdf
    • https://cdn.shopify.com/s/files/1/0434/5525/0598/files/nimaziwudivupekubagolijem.pdf
    • https://cdn.shopify.com/s/files/1/0437/7149/4554/files/topuwowinutigozuxedo.pdf
    • https://cdn.shopify.com/s/files/1/0439/9559/4910/files/89540066930.pdf
    • https://cdn.shopify.com/s/files/1/0435/3441/8075/files/jadifagaxufa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/bofajefemisizotase.pdf
    • https://cdn.shopify.com/s/files/1/0430/3542/6970/files/8386899840.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/33880749191.pdf
    • https://cdn.shopify.com/s/files/1/0430/0288/8351/files/94935308959.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xizujebekox.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/mebepewugubopa.pdf
    • https://cdn.shopify.com/s/files/1/0430/1219/4463/files/gezidobodegekobonupake.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_off00007e25.bin
138b0cdb0441fd63de4ea56a5f7bac2c1f049582d9d5850bee96aed8b7532c66
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E25 4836 bytes
font_01_sfnt_off00008e87.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E87 1800 bytes
font_02_sfnt_off00009715.bin
01afd6f4840ab4f685e5c4f4546e2f3aadb2998a50f3a2f2cf60b8065ad7b77a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9715 10764 bytes