Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ad6b3a9f12929a…

MALICIOUS

PDF

40.3 KB Created: 2020-08-12 15:37:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f6618d334a30ddc29b5d2f9d23f7557 SHA-1: 7b1a879ae7e33af37d697ce8df9f1f300be0ef78 SHA-256: a4ad6b3a9f12929ad7058314df54e542a067035c2142e1a2d178893e8da9638e
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at https://ttraff.cc/pify?keyword=english+phonetics+practice+pdf. This suggests the document is designed to lure victims to malicious infrastructure under the guise of providing practice PDFs. No scripts were extracted from this sample.

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.cc/pify?keyword=english+phonetics+practice+pdf
    • http://files.resourcesforfrenchteachers.com/uploads/1/3/1/3/131398224/8296165.pdf
    • http://piver.gusttechnology.com/uploads/1/3/1/0/131069934/kunelowolaxodaveker.pdf
    • http://files.oceanpinesplayers.com/uploads/1/3/0/8/130874125/worotiwiganoj_damofil_xusowupexuxo_ruwalujek.pdf
    • http://gosite.nicoletteward.com/uploads/1/3/0/9/130969352/3173904.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5351/files/877351922.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/56851019328.pdf
    • https://cdn.shopify.com/s/files/1/0431/7069/3284/files/15224373828.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/66283753453.pdf
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/regions_of_the_abdomen.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/ipad_error_9006.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/tejasugiziwaxiwelifugo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0400/1443/files/advanced_calculus_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0042/1790/files/52126311636.pdf
    • https://cdn.shopify.com/s/files/1/0440/5103/8358/files/wuvifizanufuwove.pdf
    • https://cdn.shopify.com/s/files/1/0430/9821/0461/files/ravojifoxilusawoj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004def.bin
d5e18b8f0baa55ffc331d74d0d195c53b7fd38767e8dcc03fef40d3659af81f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DEF 5164 bytes
font_01_sfnt_off00005f6f.bin
c01311e5926a807a87f1f0802be6fcf78c5d651d8607b129bc55a525c436fe4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6F 11576 bytes
font_02_sfnt_off00008631.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8631 4324 bytes

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