Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d9d6ee114d35ad5…

MALICIOUS

PDF

45.7 KB Created: 2020-09-01 08:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 782efd1afd53273e77a60af29cf9bf34 SHA-1: 820afb70789c7c3a526a1076eb317fcb4b5e3bb2 SHA-256: 8d9d6ee114d35ad5072cbf921eb268de0c17bc42e095d7aab9d1bfd1cbec0d26
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=air+force+model+paper+2019+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to 'static.usrfiles.com'. The document body, though heavily garbled, contains the same redirector URL and a benign-looking title, suggesting a lure to disguise malicious intent. The primary goal appears to be redirecting the user to a malicious site.

Heuristics 3

  • 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.
  • 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=air+force+model+paper+2019+pdf
    • https://static.usrfiles.com/ugd/b8c837_9a07ca46983945c9a32d91639ec6db3f.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_8c19ee56c752487291ce87a2f74f4c2a.pdf
    • https://static.usrfiles.com/ugd/0d002d_f64c8fae47e54ba7b94c19b55b2b6629.pdf
    • https://static.usrfiles.com/ugd/b8c837_4493b3712e744fbdae29f68889328556.pdf
    • https://static.usrfiles.com/ugd/6c98bc_d4ce7e312ea941bba4a567a2cdc721c9.pdf
    • https://static.usrfiles.com/ugd/61b8bf_f0ee451ce6d64d628f8f2be7284f959b.pdf
    • https://static.usrfiles.com/ugd/fbccce_528d1ab793c44747adf1876d4b407448.pdf
    • https://static.usrfiles.com/ugd/80bfa9_c199f45df1da4e728ced3895d706955f.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_de9013f55a45449d944840f877779c27.pdf
    • https://static.usrfiles.com/ugd/fbccce_0461f0d538514eae97b0f0e8455a9e7b.pdf
    • https://cdn.shopify.com/s/files/1/0441/3983/9640/files/anticlockwise_and_clockwise_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0545/files/applied_spectroscopy_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0429/3492/7513/files/bstc_answer_key_2020_download_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/6211/7020/files/gathering_storm_40k.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/reverse_an_array_java.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8442/files/free_online_magazine_cover_templates.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/a_dozen_a_day_mini_book.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067a4.bin
0463e4d2977a9f90b8b009e031e030b98b3435b82e51e8ceba12b9fd449e9154
pdf-font-stream PDF embedded font (sfnt) at offset 0x67A4 5596 bytes
font_01_sfnt_off00007a9e.bin
bd2f585f8e125de3a22716be0afaca0817ba6172ebc3c9438fd28178d5829f7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9E 9916 bytes
font_02_sfnt_off00009cbd.bin
9a3e7af0855b0971ed4e960d1afbabbea6ba84bf45843a09ca44cec8f7261173
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CBD 2832 bytes