Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd6d8d4f162a070…

MALICIOUS

PDF

49.3 KB Created: 2020-08-30 19:36:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99301a20511d60908e4a6aaae2b6afb1 SHA-1: 25d746c63028ff16a088b733277168b45bf2eedf SHA-256: 5bd6d8d4f162a07073952a390197b24fbac554dffac06ede18abdfdb8f5d523e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same text as the URL parameter, suggesting a lure. Numerous embedded links, primarily to Shopify domains, were also extracted, with one identified as a redirector.

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.com/wix?keyword=microbiology+made+rediculously+simpl
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/fesozug.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6967/files/27940728122.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/1604960643.pdf
    • https://cdn.shopify.com/s/files/1/0463/2300/7645/files/20643977618.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5340/files/171753579.pdf
    • https://static.usrfiles.com/ugd/b8c837_73bd2cffd2074b3da95b4760d81bd000.pdf
    • https://static.usrfiles.com/ugd/b8c837_85b929d8dcab4a2486368884811edd8d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c89056227e6f45a3a5d8eed9a9e47951.pdf
    • https://static.usrfiles.com/ugd/cfbfd2_ef1fd9514eae439089deac810bd19320.pdf
    • https://static.usrfiles.com/ugd/b8c837_c800a2d639294caeb60323729bd83782.pdf
    • https://static.usrfiles.com/ugd/253000_62164a7eea014dcda5fec022ce323b78.pdf
    • https://static.usrfiles.com/ugd/33ab24_9d8c28f8cc5e4a9d86aac88b289fe221.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ea319eff5db48a3b0b40251a6ba6f08.pdf
    • https://static.usrfiles.com/ugd/353d00_2b6c92a602784d31a7bda34711894cf1.pdf
    • https://cdn.shopify.com/s/files/1/0434/1940/2405/files/25130431009.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1576/files/win_10_1909_update.pdf
    • https://cdn.shopify.com/s/files/1/0459/7304/5415/files/photoshop_watercolor_brushes_free_cs6.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008fd3.bin
c421dd06a01852f4c6473501c5567c69cc6471bb609bd16ae41163eddd83be1d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8FD3 23100 bytes
font_00_sfnt_off00005a21.bin
e74db4b591f96ad6783d749a41cdc442416198cfb8fafc6a1aa10b1b76ff172e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A21 5640 bytes
font_01_sfnt_off00006d40.bin
770c87f41f441a79a87b50cbe378ed2908f744432b2e2ff1756a1a57473f983b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D40 10048 bytes

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