Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf62561fb0690db4…

MALICIOUS

PDF

55.7 KB Created: 2020-08-05 10:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be55ae37252e82c20339ad448cfe3755 SHA-1: d77eb041eecb112ba6423952a0c40e0ea56cb4e4 SHA-256: cf62561fb0690db4e334b8a00569673700f02bffb9f0ec5128e2ffca8292312e
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.ru/pify?keyword=ashab+e+kahf+book+in+urdu+pdf', which is designed to lure users to malicious infrastructure. The document body contains garbled text but includes the same malicious URL, reinforcing the lure. The presence of numerous Shopify links suggests an attempt to blend in with legitimate content while hosting the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=ashab+e+kahf+book+in+urdu+pdf
    • http://files.oak-steakhouse.com/uploads/1/3/2/6/132682882/sidigasodupuko.pdf
    • http://files.theallstarsgroup.com/uploads/1/3/0/7/130776037/puxabebotuz.pdf
    • http://files.yahsomebodycare.com/uploads/1/3/0/8/130873718/1045006.pdf
    • http://dorufigu.newinsightfss.org/uploads/1/3/2/6/132681233/pipijunisinomo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1859/8038/files/givinir.pdf
    • https://cdn.shopify.com/s/files/1/0436/1102/9666/files/49919527695.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/tiwukikalafosamewut.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/noben.pdf
    • https://cdn.shopify.com/s/files/1/0431/9582/6336/files/letoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/9872/4769/files/tukap.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/cantoral_catolico_con_acordes.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/xovopebakigubikas.pdf
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/you_re_way_too_beautiful_girl.pdf
    • https://cdn.shopify.com/s/files/1/0432/8584/0036/files/jilazan.pdf
    • https://cdn.shopify.com/s/files/1/0428/6464/0159/files/98122788980.pdf
    • https://cdn.shopify.com/s/files/1/0436/4953/2069/files/9170076992.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_off0000826c.bin
f52617f357b473e47e5c341349f98094b8a0727ef7a5c2fac57bcc6266724780
pdf-font-stream PDF embedded font (sfnt) at offset 0x826C 5288 bytes
font_01_sfnt_off00009460.bin
5862d03b437fb5642ddb474e62a172530989776de36f458d7d2b28097b1a7b16
pdf-font-stream PDF embedded font (sfnt) at offset 0x9460 11156 bytes
font_02_sfnt_off0000b8be.bin
cd7cd4e09a8f49a42980a05d4a374255ef1fc6cb598272f9b0264c53e3b38989
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8BE 17100 bytes