Malicious PDF — malware analysis report

Static analysis result for SHA-256 3291afda4fbd8353…

MALICIOUS

PDF

52.8 KB Created: 2020-08-06 15:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc2b03b16a7a8da56fd74c3ac5c3f211 SHA-1: 738c810980764406df7df91e7491e00568204cc9 SHA-256: 3291afda4fbd8353160ad29060aa168dbcf82bd976e573628ec61ce7f7d21cb4
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and appears to be a lure related to GRE topics. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to drive traffic to the malicious redirector. No scripts were extracted, but the primary malicious action is the redirection to a harmful URL.

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=gre+pool+of+argument+topics+answers+pdf
    • http://files.soubustafarms.com/uploads/1/3/0/8/130814855/7462017.pdf
    • http://baxul.thatonepinkdog.studio/uploads/1/3/1/4/131438079/zowefunexesogox.pdf
    • http://files.tastethe4thsense.com/uploads/1/3/1/6/131606169/jabelowuxoxu_jiwidu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1263/6322/files/16984666129.pdf
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/xolukazuxovijogi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.pdf
    • https://cdn.shopify.com/s/files/1/0434/6177/1430/files/calculus_2_integration.pdf
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/dadorafanawisisir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.pdf
    • https://cdn.shopify.com/s/files/1/0438/4158/5314/files/antithrombotic_therapy_and_prevention_of_thrombosis_10th_ed.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7460/files/generally_accepted_accounting_principles_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46283819311.pdf
    • https://cdn.shopify.com/s/files/1/0447/2127/5033/files/difference_between_bipolar_1_and_2.pdf
    • https://cdn.shopify.com/s/files/1/0435/2478/4283/files/ups_store_valdosta_ga.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_off00008285.bin
bd7e25fa1f59dbb22ce834544d809b443839041eb0aa8a3f61331fe901d7f89b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8285 5480 bytes
font_01_sfnt_off00009522.bin
ebcba264ceede5350259ff6bc4157302ee43218c842242c513376be7cf8dac9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9522 10172 bytes
font_02_sfnt_off0000b7e9.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E9 4324 bytes