Malicious PDF — malware analysis report

Static analysis result for SHA-256 42392f0e4acd1c8a…

MALICIOUS

PDF

46.0 KB Created: 2020-09-01 17:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8857be0cf67ac17ac1324ba89e1ac1d SHA-1: 00180b44da90c3e2d03f18f0d7b71585306761f9 SHA-256: 42392f0e4acd1c8afa80c1900bf7b0ef95a3bc422ae770c1fe64bc60d60d4777
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, masquerading as search results for a book PDF, with the primary link pointing to a known malicious redirector. This indicates a likely attempt to drive traffic to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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.link/pify?keyword=the+artist+way+julia+cameron+pdf
    • https://cdn.shopify.com/s/files/1/0433/5501/3275/files/l_auxiliaire_tre_et_avoir.pdf
    • https://cdn.shopify.com/s/files/1/0437/0215/7466/files/53791787200.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/81600172330.pdf
    • https://cdn.shopify.com/s/files/1/0434/2874/1272/files/23789680627.pdf
    • https://cdn.shopify.com/s/files/1/0438/5865/7430/files/44880959111.pdf
    • https://cdn.shopify.com/s/files/1/0438/5066/2053/files/lodudewininavoseg.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2952/files/gifts_of_the_holy_spirit_catholic.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/polarization_of_light_guard.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e0839b1a2534d9abba6fd66bce1cfb6.pdf
    • https://static.usrfiles.com/ugd/5b9a87_4d6a2a38e611479b80da722054e48f50.pdf
    • https://static.usrfiles.com/ugd/575363_cf381a1605504b1f877f40d8d073c4b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_c61f6b77d62540bba99e722449cd760c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b89b70d13faa442ebdba2253dfcfa388.pdf
    • https://static.usrfiles.com/ugd/12745a_3a301779156241fab35d759b8f17e219.pdf
    • https://static.usrfiles.com/ugd/cafc24_9fe9bec5a3764c74a0a1f716519a9eef.pdf
    • https://static.usrfiles.com/ugd/b7306e_6f57a0d5fad7441a83a798ef7e053e57.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_off000067c5.bin
449416060c9edbbf91f9a9f7a9d5bbf9a072c74bf1a7a1926f2f1ee412546849		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C5 5496 bytes
font_01_sfnt_off00007a63.bin
7e052ec4bff964f5c5ed845d33e7df9b9349a49cdabec1d4fad503594be84853		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A63 10144 bytes
font_02_sfnt_off00009d17.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D17 4324 bytes

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