Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9fb9d979872ec9…

MALICIOUS

PDF

38.4 KB Created: 2020-08-16 20:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f13054c90eafd095a9957ce7a16013e SHA-1: 08ce1029c2df81387c71ad67bb0868b17c9c889c SHA-256: ff9fb9d979872ec928a39a0fee38efa73a2c1721070812e0440eabc7b8f347b6
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector identified by heuristics. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting.

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=cymera+apk+old+version+free
    • http://files.customironideas.com/uploads/1/3/1/3/131379361/netefodubakex.pdf
    • http://files.425sqn.org/uploads/1/3/1/6/131606035/9463359.pdf
    • http://dofap.challenge2grow.be/uploads/1/3/0/8/130873998/fujiwesotafa.pdf
    • http://tovet.our-topia.com/uploads/1/3/1/4/131437252/deseki_rudimedusodasaj_komapubu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9535/0684/files/97944688549.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/rerajazoxewepoxejogumiruv.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1569/files/bozopakedosejamiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/3271/4135/files/9416281919.pdf
    • https://cdn.shopify.com/s/files/1/0434/0439/4661/files/jidopiwezoverexu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/mesumepuperexomijigen.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/10243476159.pdf
    • https://cdn.shopify.com/s/files/1/0437/7408/3233/files/75512794214.pdf
    • https://cdn.shopify.com/s/files/1/0438/5194/0000/files/tezuketebenudumizeli.pdf
    • https://cdn.shopify.com/s/files/1/0428/9639/2348/files/pegemefuweranagoxelewib.pdf
    • https://cdn.shopify.com/s/files/1/0452/5791/6577/files/51358684208.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_off000058a0.bin
2564148a9b20fd7777f1694e7cc658bb7d0d7596936b19cf03a19cdd1e7e60cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58A0 5320 bytes
font_01_sfnt_off00006aa4.bin
b8f0b89197bbad677faf1898c5ea46ba822d2fc1884a41850d5bd655915247e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA4 10024 bytes

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