Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9b1e7a9ba2f01f3…

MALICIOUS

PDF

49.8 KB Created: 2020-08-23 23:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b524b7faf25f8a3443e821dd277d3de1 SHA-1: 0729c378d7d20e56897e64da1c74421ae1c28dd5 SHA-256: a9b1e7a9ba2f01f3cd3fc859b895643dad025753b81f3b6bb197cd46443fb551
128 Risk Score

Malware Insights

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

The PDF contains a lure related to a 'lic premium calculator app for android mobile' and embeds numerous links, 30 of which are identified as part of a link farm. One critical heuristic indicates a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. This suggests the primary goal is to redirect the user to malicious infrastructure.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=lic+premium+calculator+app+for+android+mobile
    • http://files.thepurchaseflutestudio.com/uploads/1/3/1/3/131380263/vaxaxefipupezob.pdf
    • https://cdn.shopify.com/s/files/1/0431/5522/6773/files/nozuxoko.pdf
    • https://cdn.shopify.com/s/files/1/0462/2925/8389/files/alternative_energy_systems_and_applications_hodge.pdf
    • https://cdn.shopify.com/s/files/1/0437/9472/7074/files/illustrator_templates_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0430/7533/8389/files/dufilekoradetotux.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/circle_theorems_questions.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6812/files/tugix.pdf
    • https://cdn.shopify.com/s/files/1/0430/7537/1162/files/zewebupevuwamu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gaxedisurerikemamezawapux.pdf
    • https://cdn.shopify.com/s/files/1/0447/6072/7703/files/74788431529.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/35847964171.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/bumemiridepumuxuje.pdf
    • https://cdn.shopify.com/s/files/1/0434/0711/4391/files/59482570572.pdf
    • https://cdn.shopify.com/s/files/1/0462/2893/0711/files/financial_report_vodafone_2017.pdf
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/bafuxifolekejabufasokede.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/
    • https://cdn.shopify.com/s/files/1/0462/2925/8389/files/alternat

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fec.bin
41df1883aa79f5cddd21aca0e2e927df7e763b957d8e3cc6ce3d397ad4f2d802
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEC 5204 bytes
font_01_sfnt_off0000817f.bin
93905228979fc9967451138134f719604f4231c6bf62c84273b8d242d5c148ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x817F 10192 bytes
font_02_sfnt_off0000a46b.bin
e5458d7b6d82539349b17fc4713a17e1381d471255c72d9f8116b7c86e08c443
pdf-font-stream PDF embedded font (sfnt) at offset 0xA46B 16168 bytes