Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9dbc9ae6dbe91f8…

MALICIOUS

PDF

86.9 KB Created: 2020-08-10 21:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5926e227035abb094c158aac34975b9 SHA-1: d05ab51058a52ad5300980bc1c986f6d2a68a92b SHA-256: e9dbc9ae6dbe91f80b7f03cffadd91a3d9522516384710b7b52db92034d30aa4
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector pointing to 'ttraff.com'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and 'SE_INVOICE_LURE' suggests a pretext for the user to click the link. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the attack pattern. The presence of numerous external PDF links also indicates a link farm strategy.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=auditing+notes+bcom+final+year+pdf
    • http://files.brucedouglasreevesauthor.com/uploads/1/3/0/8/130873997/5cfa47.pdf
    • http://files.abookstudio.com/uploads/1/3/1/4/131483372/gutipijasazotajob.pdf
    • http://files.rootsoflove.ca/uploads/1/3/1/4/131483281/a51bec804eb50.pdf
    • http://mujekuto.thebeingmissbblog.com/uploads/1/3/2/8/132816066/bebuvenarakujimagudu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/80994077369.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2033782386.pdf
    • https://cdn.shopify.com/s/files/1/0438/8257/8088/files/nsk_taper_roller_bearing_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9175/files/jipizuwamukuxipugijewef.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/windows_7_hosts.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4076/files/sample_contract_agreement_for_services_rendered.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/fasenuzoxewo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4897/6027/files/11632020614.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/wukimuxevija.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/mimelajenenaxavamokokine.pdf
    • https://cdn.shopify.com/s/files/1/0431/8271/9136/files/92073163772.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_off00011771.bin
74f0e04cd96ef28e6d2c284af030d786207a1951f95b4249550fa06ce6ae8432
pdf-font-stream PDF embedded font (sfnt) at offset 0x11771 5708 bytes
font_01_sfnt_off00012ac3.bin
1327eb789423dc617c57aa1acd2f0731042a4553cdd203912c44b2671b580aa8
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC3 10352 bytes