Malicious PDF — malware analysis report

Static analysis result for SHA-256 cad7d664b4676300…

MALICIOUS

PDF

43.1 KB Created: 2020-08-23 01:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b52dc2f467a20f722fa0ba475137db3 SHA-1: 0bac6417c187db59b4856c636fc4b8960dab1b94 SHA-256: cad7d664b467630035b8b0e767fbf78d7b8e95c09e08d88d6e7f6363e6ce7aa6
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on ttraff.ru. This infrastructure is known to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to the URL and appears to be a lure for users searching for specific documents. The primary malicious activity observed is the redirection to potentially harmful content via a link farm.

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=net+sociology+syllabus+2019+pdf
    • http://watajotig.ambroidery.com/uploads/1/3/0/8/130814088/9bbcd1d63a86e.pdf
    • http://lotavejov.alphaomegamartialarts.org/uploads/1/3/0/7/130776485/5991756.pdf
    • http://sagufamu.jakobsvensson.com/uploads/1/3/1/3/131379874/7785839.pdf
    • http://jonute.crosley.com/uploads/1/3/1/1/131164250/gofarubi.pdf
    • http://files.adametranslationservices.com/uploads/1/3/1/4/131453679/b0e92dd3932dc.pdf
    • https://cdn.shopify.com/s/files/1/0435/3140/3413/files/baguio_country_club_membership_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0728/files/bizobinivaribod.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4099/files/49333406292.pdf
    • https://cdn.shopify.com/s/files/1/0430/8992/0154/files/jexixewekuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4650/files/gafivolozi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8949/files/51103536273.pdf
    • https://cdn.shopify.com/s/files/1/0434/7183/1193/files/37835050314.pdf
    • https://cdn.shopify.com/s/files/1/0451/1003/4597/files/fojazapisariwikukedat.pdf
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/american_and_british_english_words_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/8499270051.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/
    • https://cdn.shopify.com/s/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000687a.bin
8b30225c1d97b4605465267609fff588ea11f1e98c1b7e2be484e2fa4e038158		 pdf-font-stream PDF embedded font (sfnt) at offset 0x687A 5920 bytes
font_01_sfnt_off00007cbc.bin
1e29dcb2ff1dbfd9dda422ec50b77a2b4b5ab542303b45f0ea1d4f4c266dc14e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBC 10084 bytes

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