Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac76ea2f4ba45fbc…

MALICIOUS

PDF

50.2 KB Created: 2020-09-05 19:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 675fef47df73a30eec96782c7374d2e6 SHA-1: 7f6d709578a8f3b9c82bf365143846eed58b4730 SHA-256: ac76ea2f4ba45fbcbb53f8c74ddea0145645133b2650da96d65aa50ab843b9be
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=bruce+lee+quotes+pdf'. The document body, though heavily obfuscated, contains a reference to this URL, suggesting a lure to trick users into clicking the link. The PDF also contains a link farm heuristic, indicating a large number of external links, many of which point to Shopify domains, likely for SEO manipulation or to host further malicious content.

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.link/wix?keyword=bruce+lee+quotes+pdf
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/97143593019.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9029/files/46329563212.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9639/files/61052096250.pdf
    • https://cdn.shopify.com/s/files/1/0434/4758/2870/files/pa_ebt_phone_number.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fd0a6254a624316afc839a0cfb07ffb.pdf
    • https://static.usrfiles.com/ugd/b8c837_5849e1fc3eb24e5c8dc7a639d01e8667.pdf
    • https://cdn.shopify.com/s/files/1/0433/1051/4334/files/aplicaciones_ofimaticas_caracteristicas.pdf
    • https://cdn.shopify.com/s/files/1/0432/2285/9943/files/fozodasojaguxirofexo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8144/1181/files/80787372438.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/soxafaxabes.pdf
    • https://cdn.shopify.com/s/files/1/0433/4151/2855/files/punotu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2088/files/sozuxadezilavuxugebiro.pdf
    • https://cdn.shopify.com/s/files/1/0429/5373/6351/files/vanaspati_tantra_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/5466/8705/files/12400206810.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1284/files/chirunavvutho_songs_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/diablo_2_lord_of_destruction_hammerdin_guide.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_off00007666.bin
25b06945af417892ed83e8da166c8a84715db5d14d83f7ace1cbc06829f24b48
pdf-font-stream PDF embedded font (sfnt) at offset 0x7666 5116 bytes
font_01_sfnt_off000087d4.bin
488ffee5e9c33bcc1f3f00aec749f35977d0cdd209ffadaee35194d66ecc177d
pdf-font-stream PDF embedded font (sfnt) at offset 0x87D4 6148 bytes
font_02_sfnt_off000097b4.bin
f930534944f1986047a1212741244af58a68c74ce8ee543d567ae462cd56f81e
pdf-font-stream PDF embedded font (sfnt) at offset 0x97B4 10504 bytes