Malicious PDF — malware analysis report

Static analysis result for SHA-256 4497256ae30dd840…

MALICIOUS

PDF

37.8 KB Created: 2020-09-02 14:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f9ecb22a90edca8b4476f88fc3f0db2 SHA-1: 7b756b2514710edaa7c918a3edb72ac0b46d1002 SHA-256: 4497256ae30dd840b6b3867d21197724cda47c20d0f5175cee16996e895385aa
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector (ttraff.me), suggesting a phishing or malware distribution attempt. The presence of a link farm further supports this, as it's a common technique to obscure malicious destinations. The ML classifier also strongly indicated maliciousness.

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.me/pify?keyword=brindishe+lee+uniform
    • https://cdn.shopify.com/s/files/1/0463/5010/6786/files/aarey_drugs_pharmaceuticals_ltd_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/2381/8139/files/ecological_pyramid_pogil_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/4528/8093/files/alquimia_paulo_coelho.pdf
    • https://cdn.shopify.com/s/files/1/0433/0402/6280/files/93481515723.pdf
    • https://cdn.shopify.com/s/files/1/0434/9929/0776/files/72227376806.pdf
    • https://static.usrfiles.com/ugd/b65acf_e64b3284505147bc90735d06f580a071.pdf
    • https://cdn.shopify.com/s/files/1/0462/7592/0021/files/kofasujepuvezeguluzovixit.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/nijazinedilador.pdf
    • https://cdn.shopify.com/s/files/1/0434/3840/7832/files/togamike.pdf
    • https://cdn.shopify.com/s/files/1/0463/7717/3147/files/combinational_logic_circuits_questions_answers.pdf
    • https://static.usrfiles.com/ugd/f967ac_ad95ce901d1644ceb5480c8f04300987.pdf
    • https://static.usrfiles.com/ugd/f67134_9e102ee2e0554455963a298a6f31c089.pdf
    • https://static.usrfiles.com/ugd/93c935_f7e43b91b7564a70bdebb4d1b5194211.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_off0000586b.bin
05d25e285c3c611fcd6dae96b0d9d6d7d8da672bfe61df77f6cb79acb51dfe52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x586B 4984 bytes
font_01_sfnt_off0000693a.bin
39551854b1b2fc443cd54f618277d8f74095f46a7b3783661e23cf825fb1db16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x693A 9796 bytes

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