Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6eabe6c7324254a…

MALICIOUS

PDF

44.0 KB Created: 2020-08-10 07:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 588d6f81ea6454e9f04a3945fa3889e0 SHA-1: 5c34958a87ec50840e18c032136d48f5f0a50669 SHA-256: c6eabe6c7324254ad7d69b6592946272896bb53076ec2b05a4004e4a19e25acd
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link and a link farm, indicating an attempt to direct users to malicious sites. The document body text, though heavily obfuscated, contains keywords related to accounting and includes the malicious URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to improve search engine ranking for malicious content or to obscure the true destination.

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.ru/pify?keyword=accounting+ledger+list+pdf
    • http://files.cestagift.com/uploads/1/3/1/1/131163601/tezuxijolamokub_bozolugadajaso.pdf
    • http://robage.homilytools.org/uploads/1/3/0/7/130775612/fujisoluw.pdf
    • http://files.halltosuccess.com/uploads/1/3/1/6/131606756/sikomolesolubo_jisipugeje.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2893/files/50105735012.pdf
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/arduino_uno_microcontroller.pdf
    • https://cdn.shopify.com/s/files/1/0437/1972/1115/files/vazajumoxovokaderilol.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/jerifenubexigubefilasox.pdf
    • https://cdn.shopify.com/s/files/1/0435/5185/0655/files/geometric_transformation_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/7251/1386/files/marc_fisher_le_millionnaire_tome_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/mizikikilugezonab.pdf
    • https://cdn.shopify.com/s/files/1/0437/2296/5160/files/pitid.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0309/files/19363846011.pdf
    • https://cdn.shopify.com/s/files/1/0440/7659/7400/files/lidafisitojojeloxotukin.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/fosunotolilovura.pdf
    • https://cdn.shopify.com/s/files/1/0438/9833/9496/files/69845261404.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_off00005cfe.bin
85af1bb9bb99475b290ae4aa2573ce967181c38f4ebe7d1829179ea776fd2658
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFE 4984 bytes
font_01_sfnt_off00006dfc.bin
79c09cf49679176f75dfc113d4db91bc5043f265f292dc12dec32f49cfa812d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFC 12056 bytes
font_02_sfnt_off00009504.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9504 4324 bytes