Malicious PDF — malware analysis report

Static analysis result for SHA-256 df1f52177efcb423…

MALICIOUS

PDF

50.2 KB Created: 2020-09-03 07:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0aedc69376239fb12bbb366a96985538 SHA-1: 9625398670cc3d32f65d365de3e87fbae8ef240e SHA-256: df1f52177efcb4230bf7e4220149be83bdcaf5cbf2b6a309645e6d5f89f9b920
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary malicious URL is https://ttraff.me/pify?keyword=glass%2527+s+guide+car+values+book, which likely serves as a gateway to further malicious content. The document body appears to be obfuscated or corrupted, but the presence of numerous links to external PDFs suggests a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=glass%2527+s+guide+car+values+book
    • https://static.usrfiles.com/ugd/29c71c_37c8c2ba3c3a4fae908f54e2c4441320.pdf
    • https://static.usrfiles.com/ugd/74a852_b90d876849e84641b410f61883b67695.pdf
    • https://static.usrfiles.com/ugd/35ddae_86e18fbb55634c7ba80e82be8c703740.pdf
    • https://static.usrfiles.com/ugd/d5d855_5ae947416eb94dd3ab44d304dde8dc4e.pdf
    • https://static.usrfiles.com/ugd/55f640_f319a52db6444606811c74492e1ae1b3.pdf
    • https://static.usrfiles.com/ugd/99965f_ed81d794e0c249e796acdb3c2f6538f0.pdf
    • https://static.usrfiles.com/ugd/89441e_6fafce4ff4854ae693d250217184ddf3.pdf
    • https://static.usrfiles.com/ugd/8a419d_f69596bc1b234d6b8a99d3b3303920ed.pdf
    • https://static.usrfiles.com/ugd/2ca22b_e3474ac2d2c74413aef74ea03f24d914.pdf
    • https://static.usrfiles.com/ugd/3649d2_54ba2a87f3824904a670f72ac12804cf.pdf
    • https://static.usrfiles.com/ugd/cc14e4_9d175a78582a48e68aebc3c5986de8c2.pdf
    • https://cdn.shopify.com/s/files/1/0429/2296/7207/files/78173116619.pdf
    • https://cdn.shopify.com/s/files/1/0437/0153/4875/files/54816518749.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9115/files/68649664990.pdf
    • https://cdn.shopify.com/s/files/1/0429/6015/8873/files/nikal.pdf
    • https://cdn.shopify.com/s/files/1/0432/1050/6404/files/relemex.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_off00007870.bin
5158e253fe0ca3df9b613e98be7bb84d9aeb97cd23072a836134baa97f867f68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7870 5132 bytes
font_01_sfnt_off00008a02.bin
c57c3f3e55912fea9c0d9ebd605e998f1cac025964dc408b3d692a2af5a27f5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A02 10488 bytes
font_02_sfnt_off0000ade3.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADE3 4324 bytes

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