Malicious PDF — malware analysis report

Static analysis result for SHA-256 c583c4d2d93c47f8…

MALICIOUS

PDF

39.2 KB Created: 2020-08-22 13:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33e07a917955b20c0c43202f45e21253 SHA-1: a9ab01788bd24f0e94fd9c56db8c1e92e20deb3c SHA-256: c583c4d2d93c47f8d0ce7603a15f8eb507994ce77f222a2912d830ad1e012b58
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector (ttraff.com). The ML classifier strongly indicates maliciousness. The document body, though partially corrupted, contains the same malicious URL, suggesting a lure to a phishing or malware distribution site. No scripts were extracted, but the presence of numerous links, including a link farm, indicates a social engineering attempt to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=choose+love+stormie+omartian+pdf
    • http://togazufi.nateveorganic.com/uploads/1/3/1/3/131384424/74fc1a.pdf
    • http://femunume.coopermaine.com/uploads/1/3/1/8/131871505/fapowiv.pdf
    • http://files.agelessumedspa.net/uploads/1/3/1/3/131383821/bitosabojemaxa.pdf
    • https://cdn.shopify.com/s/files/1/0435/1747/7019/files/52399822091.pdf
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/69675972225.pdf
    • https://cdn.shopify.com/s/files/1/0436/9498/1273/files/42168132423.pdf
    • https://cdn.shopify.com/s/files/1/0437/9115/5361/files/chartboost_android_integration.pdf
    • https://cdn.shopify.com/s/files/1/0429/3220/7782/files/days_of_the_week_worksheets_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0316/files/how_to_cite_file_in_mla_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/6461/4303/files/donogun.pdf
    • https://cdn.shopify.com/s/files/1/0439/7131/3822/files/renivorujogipijokareluvas.pdf
    • https://cdn.shopify.com/s/files/1/0434/8159/6066/files/rolan.pdf
    • https://cdn.shopify.com/s/files/1/0439/2484/8795/files/real_ielts_reading_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7707/files/air_pollution_ppt_presentation.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_off00005c42.bin
b809064d1596fd04eb06563acd99db146df51b29f0e81b9b80593d2d4c7da779
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C42 5244 bytes
font_01_sfnt_off00006df0.bin
bbb84798d6dd7c1054de68a05dbec67ee54961ebc6f52183010620bf8a93bc4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF0 9932 bytes