Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c1053c07650796…

MALICIOUS

PDF

49.1 KB Created: 2020-08-17 05:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01115ee8fba6204dd9546f5051203523 SHA-1: 3c4948fa12a6cb2f12f5aa915ed69b714a3f3261 SHA-256: c2c1053c07650796fab15c0219a985bda245b1e5776159d9c884a6d6224a63fa
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to SEO-optimized PDF files, a common tactic for link farms. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure users into clicking it under the guise of a horoscope or grammar exercise. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=birth+horoscope+in+tamil+pdf
    • http://files.deansvillehorseshoeclub.com/uploads/1/3/0/8/130815277/kitojuz.pdf
    • http://files.deficientautobiographicalmemory.com/uploads/1/3/1/3/131379382/58271c2ae7e82.pdf
    • http://files.atmospheremartialarts.com/uploads/1/3/0/7/130775027/6589324.pdf
    • https://cdn.shopify.com/s/files/1/0435/4179/0871/files/connectors_in_english_grammar_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/jumbled_sentences_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/3490/1671/files/fazoloxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2035/2677/files/86970459281.pdf
    • https://cdn.shopify.com/s/files/1/0437/6628/4446/files/civic_education_curriculum.pdf
    • https://cdn.shopify.com/s/files/1/0432/1918/9915/files/centrifugal_pump_design_tuzson.pdf
    • https://cdn.shopify.com/s/files/1/0431/8068/7520/files/paxosovoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tanedikefiresemur.pdf
    • https://cdn.shopify.com/s/files/1/0439/2783/0696/files/57528633118.pdf
    • https://cdn.shopify.com/s/files/1/0435/1721/4874/files/todavekomozafutobuwuxega.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/sefuzixefebewuvo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6815/files/get_index_of_item_in_list_python.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_off00005519.bin
c2beb4b0063b8785fab06402e3d2540fcec8a5e9219de457c5ac372b6eeedfb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5519 5444 bytes
font_01_sfnt_off00006769.bin
dc1ec0dac044c1c47d99101cb6752750d43ed70162df17a812868ff35557c895
pdf-font-stream PDF embedded font (sfnt) at offset 0x6769 10952 bytes
font_02_sfnt_off0000850f.bin
7dd711da73de5f7669c48d42b4061d666aa041a2b12fb5e4cab360aab9f59c28
pdf-font-stream PDF embedded font (sfnt) at offset 0x850F 15952 bytes