Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9070dc1d7410dbe…

MALICIOUS

PDF

63.1 KB Created: 2020-08-14 03:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca9119666260d40b900cb781162328c2 SHA-1: 7e4a5b2cd2de439c6f061e099389a59d41cb7dd0 SHA-256: f9070dc1d7410dbebd1feed4a63c4960ed07f5d731d63f27a078bcca4fdefd97
140 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. This link, 'https://ttraff.ru/wb?keyword=bowen%20university%20post%20utme%20past%20questions%20pdf', likely serves as a lure to a phishing site or a malware download. The document also exhibits characteristics of a callback phishing lure, suggesting a social engineering attempt to trick the user into contacting a fraudulent entity. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, potentially for SEO manipulation or to obscure the malicious redirector.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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/wb?keyword=bowen%20university%20post%20utme%20past%20questions%20pdf
    • http://bepax.christumcri.org/uploads/1/3/0/7/130740008/6232592.pdf
    • http://files.rambunction.net/uploads/1/3/1/0/131069839/173081.pdf
    • http://files.affordableweddingvideos.net/uploads/1/3/1/3/131380005/kivusiwuwolutadupofu.pdf
    • http://files.interfaithutica.org/uploads/1/3/0/9/130969218/9093583.pdf
    • http://bofezevo.sgionet.com/uploads/1/3/0/9/130969945/fetosu-doribef-moxezelipexawi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/zojinilorixo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8055/files/wixurumiku.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/21682659338.pdf
    • https://cdn.shopify.com/s/files/1/0431/1161/2572/files/aws_certified_developer_associate_level_dumps.pdf
    • https://cdn.shopify.com/s/files/1/0428/4763/3575/files/peter_lynch_beating_the_street_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/6903/6958/files/74489504921.pdf
    • https://cdn.shopify.com/s/files/1/0439/3166/4552/files/27625308739.pdf
    • https://cdn.shopify.com/s/files/1/0428/3724/6118/files/84964210040.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1669/files/venenatis_guide_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0430/2418/7549/files/36800620477.pdf
    • https://cdn.shopify.com/s/files/1/0431/1311/9905/files/68862498424.pdf
    • https://cdn.shopify.com/s/files/1/0434/1838/6588/files/naruto_shippuden_episode_470.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008481.bin
88cf64103bd017742d293ddf208965c4c5dcde45e8fce5bf15ace754b3176eb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8481 5584 bytes
font_01_sfnt_off0000977a.bin
9f0666c3bb5b1a89b188cbcf10ecb01371531253e54030de0eba41ea5d856d0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x977A 11680 bytes
font_02_sfnt_off0000b2dd.bin
e8a52f9d2822b1f7b6bf4bc5d49f771f6399a49c81fef273a33dcd2959a3b79d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2DD 10772 bytes
font_03_sfnt_off0000d7db.bin
91c30074f85501cb5fe9baf33f35f843940bfa30be12b849312283e920dd8f5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DB 16488 bytes

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