Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cbfb1084322d107…

MALICIOUS

PDF

60.2 KB Created: 2020-08-21 20:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 534764136c29f802f58f0f1a4628575f SHA-1: 00c20ce5339278faa7caf56a955489f0f23647a0 SHA-256: 1cbfb1084322d1077dc43164424586b2beadfb440b60016ad2ec4cb924d07f3e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=linear+combination+of+atomic+orbitals+pdf'. This URL is embedded within the document body, disguised as a legitimate PDF download. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign Shopify links, likely to improve SEO and mask the malicious intent. The primary malicious URL is the most critical IOC.

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.ru/pify?keyword=linear+combination+of+atomic+orbitals+pdf
    • http://nigajix.mathiasmarketing.com/uploads/1/3/2/3/132303382/lefarojevid.pdf
    • https://cdn.shopify.com/s/files/1/0431/9445/0078/files/google_wifi_router_for_dsl.pdf
    • https://cdn.shopify.com/s/files/1/0433/8660/1626/files/actuarial_mathematics_bowers_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5175/files/apostila_atos_dos_apstolos.pdf
    • https://cdn.shopify.com/s/files/1/0433/8411/1267/files/solovanatomu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/buwefofosefugipa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3279/5541/files/93182058308.pdf
    • https://cdn.shopify.com/s/files/1/0429/2041/1303/files/91400180334.pdf
    • https://cdn.shopify.com/s/files/1/0429/4184/1575/files/kajob.pdf
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/98793830356.pdf
    • https://cdn.shopify.com/s/files/1/0433/5940/4197/files/naxegegowuxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejukimuvili.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_off00009fda.bin
2b8981244a7523a8621c1b4a23813705a2aa2d2aac1f3fa1fcd9bf33c05eb107		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FDA 5384 bytes
font_01_sfnt_off0000b203.bin
3de58fb4bff33da35ae7a15d0b576b44003a670a880fd076fbe5dd31c1f28615		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB203 16208 bytes

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