Malicious PDF — malware analysis report

Static analysis result for SHA-256 cecbe0b43d8221cb…

MALICIOUS

PDF

42.4 KB Created: 2020-09-05 19:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34781fbecd2d0f4f1ca04f28f50c52da SHA-1: 209e0909277118ddff419d76e73b595a26e60368 SHA-256: cecbe0b43d8221cb7db6d32b6e0574fe94ce2521097a8390800977b4bae4500e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that a link within the document leads to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.me/wix?keyword=adobe+premiere+rush+cc+android+apk, which is likely intended to lure the user to a malicious site. The presence of a link farm suggests a phishing or SEO poisoning attack. No scripts were extracted from this sample.

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=adobe+premiere+rush+cc+android+apk
    • https://cdn.shopify.com/s/files/1/0436/0772/0094/files/front_end_website_design_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/0228/8537/files/2420982498.pdf
    • https://cdn.shopify.com/s/files/1/0437/2011/4327/files/anniversary_cake_pic.pdf
    • https://cdn.shopify.com/s/files/1/0448/2560/8353/files/pijaso.pdf
    • https://cdn.shopify.com/s/files/1/0457/4878/1212/files/akram_bhai_ringtone.pdf
    • https://static.usrfiles.com/ugd/b8c837_b30317aaa5564d66978070745cb83036.pdf
    • https://static.usrfiles.com/ugd/2072cd_2ed84be58ab04f598d7d749306733752.pdf
    • https://static.usrfiles.com/ugd/89064d_baa783a78b604b4dafe7a84df1d72d11.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/liremefadonulizo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4419/9829/files/adobe_illustrator_report_templates_free.pdf
    • https://static.usrfiles.com/ugd/3e5d97_b20805bc828a41988b69dd46cdcfc914.pdf
    • https://static.usrfiles.com/ugd/4b874d_fda07d35623f4b6189488717e5c1b6c1.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_off000065e5.bin
28145b997699967645f26f53157264344bea8ca09e6968cbc16bba8e1fa111a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x65E5 5476 bytes
font_01_sfnt_off0000784c.bin
b361e223341d1035f04232e9b0b5cdb85a1f72384e6cff2c6310f07b04fc4064
pdf-font-stream PDF embedded font (sfnt) at offset 0x784C 11184 bytes