Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaaaf2214b3c4c44…

MALICIOUS

PDF

38.4 KB Created: 2020-09-12 22:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 015ba2ce5211978220986c4c74c46a16 SHA-1: 642731eac8e247f81deaf67657a3de03c9b40388 SHA-256: aaaaf2214b3c4c44385784249a24880f6844558c1be18d84a76dee4b31b11bed
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a search query and the malicious URL, suggesting a lure to a phishing or malware distribution site. 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.cc/wb?keyword=greensboro%20news%20and%20record%20circulation%20phone%20number
    • http://tewuxu.vlavc.com/uploads/1/3/1/4/131437886/33377.pdf
    • http://files.notenoughwalls.com/uploads/1/3/1/3/131380138/fefit.pdf
    • http://files.gettinoutdoorsradio.com/uploads/1/3/0/7/130776265/2914750.pdf
    • http://files.mindfulness-heidelberg.de/uploads/1/3/0/7/130739340/nozefadino.pdf
    • https://static.usrfiles.com/ugd/48bf55_001fc2df65bf408da7371b5ae66d11d7.pdf
    • https://static.usrfiles.com/ugd/0a593f_528fa924dd174614ae96e7b47c21d34c.pdf
    • https://cdn.shopify.com/s/files/1/0438/7956/3419/files/58608800298.pdf
    • https://cdn.shopify.com/s/files/1/0435/6620/3029/files/b._ed_online_form_ignou.pdf
    • https://cdn.shopify.com/s/files/1/0465/9429/3925/files/77012701725.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/74955246312.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/65038776639.pdf
    • https://static.usrfiles.com/ugd/b972d5_2c653339fe8c442b9da8359316a88b89.pdf
    • https://static.usrfiles.com/ugd/defdb4_3f1bd9b1a3df4db9b271e92213817add.pdf
    • https://static.usrfiles.com/ugd/a640e9_231179e64a2f45ce9d588fe23adc6731.pdf
    • https://static.usrfiles.com/ugd/978dd5_b3385ca01dbc4c0fb2a0b2a56f2ec8e2.pdf
    • https://static.usrfiles.com/ugd/585b1d_010134baea444e459831f9b1b88abb96.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_off00005689.bin
c90888af420f13f5c034823afe47d18c73ed950ad0911ceefe5b9703c12535d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5689 5576 bytes
font_01_sfnt_off0000695c.bin
790c8f4044991ea3c0eb0600bdcd1ae33d03c2e67b5898591a7668f4ac39663a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x695C 10200 bytes

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