Malicious PDF — malware analysis report

Static analysis result for SHA-256 6455692d598d42fc…

MALICIOUS

PDF

41.1 KB Created: 2020-09-04 20:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29d92449d327958a738c02479d579f3e SHA-1: 675fa08529c98d11a96b27efd16cecfd9336fd7f SHA-256: 6455692d598d42fcd24b65b3f012bde03bb2164146e74b27faf1eca4a765acd5
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.me', which is also present in the document body. This suggests the document is designed to redirect users to potentially harmful content, likely a phishing or malware distribution site. The presence of a large number of external PDF links, many of which are benign, indicates a link farm or SEO poisoning attempt to improve the ranking of the malicious link.

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.me/wix?keyword=abbyy+finereader+10++free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a18aa6_e11d79618a804d1eaa66637ca00cf813.pdf
    • https://static.usrfiles.com/ugd/0d2908_5fbab09ceb564d04ab657db986309ae1.pdf
    • https://static.usrfiles.com/ugd/7603ae_05d22745b8164df6861559c009ea0021.pdf
    • https://cdn.shopify.com/s/files/1/0439/0499/1400/files/83599115508.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/63086249660.pdf
    • https://cdn.shopify.com/s/files/1/0435/7973/6223/files/2_inch_thick_black_foam_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0437/9394/0629/files/chuyen_dang_hinh_sang_word.pdf
    • https://cdn.shopify.com/s/files/1/0435/5401/3336/files/34576613737.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/jogotapezegebamixokevedu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3533/6616/files/application_format_for_job_on_compassionate_ground.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/wogitisunameka.pdf
    • https://cdn.shopify.com/s/files/1/0437/3685/8773/files/aatish_episode_13.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_off000062ce.bin
c1ad18651de09e4aefe4b4ec9ca0b6555f54979ee95b24bf441ffd9fbce660dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x62CE 5116 bytes
font_01_sfnt_off00007452.bin
8ea8628579ac4edf6cc063ea035911f45f86164592c4acaaad53a6926eb8c634
pdf-font-stream PDF embedded font (sfnt) at offset 0x7452 10336 bytes