Malicious PDF — malware analysis report

Static analysis result for SHA-256 b81d3301813ee42b…

MALICIOUS

PDF

42.9 KB Created: 2020-08-24 02:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8367fd2bdbc6905d06a8af1cc3fec620 SHA-1: 4887458bc7e434695c7f9c3f3224218d0c62bcfc SHA-256: b81d3301813ee42b88c787df832039e7b3347a36b87e2980c2311128c66fbea5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector at 'ttraff.ru', which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to redirect the user. The presence of a link farm and a malicious redirector suggests a phishing or malware distribution attempt.

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=bootloader+meaning+android
    • http://files.premierbreederwebsites.com/uploads/1/3/0/8/130813965/ronul_negegojetevota.pdf
    • http://files.oliverfeist.com/uploads/1/3/1/4/131453574/4136902.pdf
    • https://cdn.shopify.com/s/files/1/0435/3127/2351/files/kakejesiboxiwojakiponoze.pdf
    • https://cdn.shopify.com/s/files/1/0432/7482/9987/files/hegemonic_war.pdf
    • https://cdn.shopify.com/s/files/1/0428/1335/8247/files/bulaklak_sa_city_jail_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/25206960487.pdf
    • https://cdn.shopify.com/s/files/1/0436/8800/1689/files/88084348597.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/nenoketi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9484/3293/files/45481577906.pdf
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/smartsheet_conditional_formatting_due_date.pdf
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/toyota_navigation_update.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/76800633553.pdf
    • https://cdn.shopify.com/s/files/1/0435/2763/5095/files/freeing_king_awowogei_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c06.bin
ab219260d35884e1817068bee5323f0968300a08794925baa89f67c10d3460d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C06 5016 bytes
font_01_sfnt_off00007cfb.bin
2f1463faa80d5a38c543cf9e3ddbfcdd75213f7b370d30b5bdca39589bfeff48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFB 10080 bytes

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