Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c20afdff9da36a…

MALICIOUS

PDF

44.1 KB Created: 2020-08-14 02:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ec7f4534e4019fbfdcc4b7d2218495a SHA-1: ce5d640955cd9e68310ee58cdbcd2e95b13db112 SHA-256: 12c20afdff9da36a026f6b82b1e23c4d41b5ed77100293cdaceee341445e5665
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though partially corrupted, includes the same URL, suggesting an attempt to lure users to malicious content. The presence of a large number of external PDF links also indicates a link farm strategy, likely for SEO manipulation or to host further malicious content.

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=ec2+cloudformation+template
    • http://files.oaktreecounselor.com/uploads/1/3/1/3/131398144/wigakoto_gipivazilikug_wopej_sasaguw.pdf
    • http://lifululet.sunshineandraindrops.com/uploads/1/3/2/7/132740978/9581297.pdf
    • http://files.flhearingloops.com/uploads/1/3/1/3/131381464/xesazivetijixe.pdf
    • http://files.bethellutheranschool.org/uploads/1/3/1/3/131398250/kidetile.pdf
    • http://gizog.madisontoth.com/uploads/1/3/1/3/131379578/femunoxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2273/5765/files/61205184573.pdf
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/libro_bautismo_de_fuego.pdf
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/tudebejobibuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/wasoriwip.pdf
    • https://cdn.shopify.com/s/files/1/0451/3647/8361/files/aula_internacional_1_new_edition_vk.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/nuwusomulanifiju.pdf
    • https://cdn.shopify.com/s/files/1/0434/5056/4773/files/maths_problem_solving_puzzles.pdf
    • https://cdn.shopify.com/s/files/1/0435/7432/9499/files/newepadela.pdf
    • https://cdn.shopify.com/s/files/1/0429/0949/9558/files/zizekemonivigataroge.pdf
    • https://cdn.shopify.com/s/files/1/0430/3339/5353/files/inglourious_basterds_movie_script.pdf
    • https://cdn.shopify.com/s/files/1/0447/8962/9085/files/dark_souls_2_dragon.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000702a.bin
c6e96e80c136777bc698936baef0b338d404c02a4e5dd7ce8610e2977592a8c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x702A 5212 bytes
font_01_sfnt_off000081c3.bin
d14340a44e8544ab90904894fd91f6eaa6fba23aea76987eec93df09f746b15a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81C3 9916 bytes

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