Malicious PDF — malware analysis report

Static analysis result for SHA-256 370c2ad2b279aa0a…

MALICIOUS

PDF

40.7 KB Created: 2020-08-25 17:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf0cf02bc5a5f635819b463ec83ddda7 SHA-1: 7c71de8d3532aa1e79c7548f6a352e8997ccb001 SHA-256: 370c2ad2b279aa0a27200847b87414da1f807138f7c50c20e3f231feebf034e1
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is part of a link farm designed to improve search engine rankings for malicious content. The document body, though heavily obfuscated, contains the primary malicious URL and several other URLs hosted on Shopify and other domains, suggesting a broad distribution effort. The ML classifier strongly indicates malicious intent.

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.ru/pify?keyword=greytown+weather+report
    • http://tigadekod.katherinemcmahonart.com/uploads/1/3/0/8/130815031/rozij_riwiximakimi.pdf
    • http://jimimupup.bh365project.com/uploads/1/3/1/6/131606346/9294074.pdf
    • http://xukipozo.lazytk.com/uploads/1/3/1/0/131069934/3f45e371.pdf
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/19773133382.pdf
    • https://cdn.shopify.com/s/files/1/0434/1353/6935/files/lemeximibowamuwiwakat.pdf
    • https://cdn.shopify.com/s/files/1/0433/2657/0664/files/netgear_wn_3000_rp_setup.pdf
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/illinicare_authorization_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/2988/8161/files/jalefaxuxipovefude.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/gebakarebowoluluvedatof.pdf
    • https://cdn.shopify.com/s/files/1/0437/6435/1130/files/sefezagiwigokibip.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/71868646510.pdf
    • https://cdn.shopify.com/s/files/1/0429/3171/6262/files/begulotefidimajefom.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9787/files/bexanexixirimenetabato.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_off000053f3.bin
b2d17e624778a9af5b0bd22cceadb3f6de4c794820177b9644db1bdbf400c51f
pdf-font-stream PDF embedded font (sfnt) at offset 0x53F3 4924 bytes
font_01_sfnt_off000064c8.bin
9e8d0a13dd65aea4722e83b8d6fbd569d6ef3bc6ee6831eceaf747e66964971b
pdf-font-stream PDF embedded font (sfnt) at offset 0x64C8 15484 bytes