Malicious PDF — malware analysis report

Static analysis result for SHA-256 81208fe1d600b0bb…

MALICIOUS

PDF

50.2 KB Created: 2020-08-21 00:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ff9dfa9e8daaf36f2cc2a3adf7fcfd1 SHA-1: 2d458075864f11efbd60468a3e1b204f17903cf3 SHA-256: 81208fe1d600b0bb00a522ed50347f19bd8e83588cc65c8532c844e30d936fb5
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical redirector link to 'ttraff.com'. This suggests a link farm or SEO poisoning tactic to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the attack pattern.

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=bosquejos+evangelisticos+pdf
    • http://files.chattahoocheehospice.com/uploads/1/3/0/9/130968981/8346492.pdf
    • http://files.dinorowan.com/uploads/1/3/1/3/131383998/cf915faa.pdf
    • http://posuxaza.swisscompleteeyecare.com/uploads/1/3/2/6/132681464/tumefuruvutoxo.pdf
    • http://files.adriannaelizabethphotographyandmakeupartistry.com/uploads/1/3/1/6/131636808/lavaxoked_bekopofefilire_dupareze.pdf
    • http://files.rimatlanta.org/uploads/1/3/1/4/131437530/3cca8.pdf
    • https://cdn.shopify.com/s/files/1/0451/2101/1865/files/mathematical_physics_by_satya_prakash_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/ramelederekekajawuxakiji.pdf
    • https://cdn.shopify.com/s/files/1/0434/2385/8850/files/enga_karuppasamy_songs_lyrics_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0438/8693/6219/files/21507494376.pdf
    • https://cdn.shopify.com/s/files/1/0433/8778/1276/files/lajesirixiwevovip.pdf
    • https://cdn.shopify.com/s/files/1/0440/6883/1382/files/85797876511.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/65361329501.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/julevap.pdf
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/81702544324.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7582/files/missoula_10_day_weather.pdf
    • https://cdn.shopify.com/s/files/1/0439/1269/1867/files/dabimulukavufulawulu.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_off00008226.bin
a2fd6c2dc3fb29a2d777132e2eae47677ead5db8a33040814fd7e564d2cbdec4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8226 5536 bytes
font_01_sfnt_off00009522.bin
f84586d3dfc3e04670edaf228ccf63b3174a7afa32fb50a771455aa842cb2bcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x9522 12104 bytes