Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3c9ef82bec46dea…

MALICIOUS

PDF

54.4 KB Created: 2020-08-13 15:26:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41114d767eb3732b0b0e37d8bd48fb22 SHA-1: ce74340e8e30e2b16e258c661c76085af28bbd03 SHA-256: f3c9ef82bec46deaded13dc9a03aff4b9901ca600daa83229bbe6bae3f7118c6
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a link farm, embedding numerous external PDF links, many of which resolve to Shopify domains. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the lure. The primary attack pattern involves redirecting the user to malicious infrastructure.

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.com/pify?keyword=exercicios+baixa+idade+media+pdf
    • http://files.hazlehurstcentre.org/uploads/1/3/2/6/132681928/6f380d7.pdf
    • http://files.themavericks.org/uploads/1/3/0/9/130970004/6327928.pdf
    • http://pifug.munrocollege.com/uploads/1/3/1/4/131483147/3906525.pdf
    • http://femarogu.lgandsministries.org/uploads/1/3/1/4/131438137/cbc20a96ce871.pdf
    • http://files.carlosboix.com/uploads/1/3/1/4/131437276/9215426.pdf
    • https://cdn.shopify.com/s/files/1/0434/7671/3637/files/77530870337.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/71209130391.pdf
    • https://cdn.shopify.com/s/files/1/0433/9286/0327/files/21227889187.pdf
    • https://cdn.shopify.com/s/files/1/0428/3134/7868/files/l_agriculture_intensive.pdf
    • https://cdn.shopify.com/s/files/1/0437/4049/6033/files/tipos_de_ametropias.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/juxazozilo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/18446403813.pdf
    • https://cdn.shopify.com/s/files/1/0429/5029/5708/files/catalogo_4_avon_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/7888/5280/files/jofuzuxekaduwewisazu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/tau_empire_codex_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11383010616.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000910e.bin
1b4d865f260a90dc57fb03fbad58055601ad0b22b434f27e56abf4ba2eac0439		 pdf-font-stream PDF embedded font (sfnt) at offset 0x910E 5436 bytes
font_01_sfnt_off0000a36a.bin
ad4675c0a57444bb1cc35a48596dfd938ef921211ebf04b9b407dd6359fca7a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA36A 12976 bytes

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