Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf483c66deae317…

MALICIOUS

PDF

37.6 KB Created: 2020-08-30 21:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4a57ec05850e720969651854a3a1a5f SHA-1: 4e8dd025a3f964281a9f38001d142032222a1e68 SHA-256: adf483c66deae317ed6371a3e041550b5c6efb91b54350af6da56b4b66d97130
154 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a significant number of embedded links. One of these links, 'https://ttraff.com/wix?keyword=visual+dictionary+of+architecture+2n', points to known malicious redirector infrastructure. The document appears to be a link farm, likely intended to lure users into clicking malicious URLs for phishing or malware delivery.

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=visual+dictionary+of+architecture+2n
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/67110512426.pdf
    • https://cdn.shopify.com/s/files/1/0432/2492/4319/files/46397620341.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/soxeruxit.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bfb702965b1477b80a3483ce8996ab9.pdf
    • https://static.usrfiles.com/ugd/d2751c_d396e2acf85746579ba0a4996efe0e4a.pdf
    • https://static.usrfiles.com/ugd/1f2646_4d610ce5917c44449f993c33f7116ab3.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa4db6f9a45f48cb88f10a343208b50b.pdf
    • https://static.usrfiles.com/ugd/7d21c0_dcad507d3f85414cb705590925a99193.pdf
    • https://static.usrfiles.com/ugd/0d2908_d4d020506c8247159097c384fc4164b4.pdf
    • https://static.usrfiles.com/ugd/e6092c_96afdb4895874fabbf0630a75ff376bc.pdf
    • https://static.usrfiles.com/ugd/f65518_afed85ad10124a5085c4cd170d476cdf.pdf
    • https://static.usrfiles.com/ugd/74a852_de68c7e3bc5c479d8cc6db44438480d0.pdf
    • https://static.usrfiles.com/ugd/6846fe_6471a71d8e59414987ac08998112af76.pdf
    • https://static.usrfiles.com/ugd/f515ca_214d8ea3966a4a99a2634907512d7439.pdf
    • https://static.usrfiles.com/ugd/837d34_11c6aeda77064dcfb32b2117667edc89.pdf
    • https://static.usrfiles.com/ugd/b98abb_da71d7265ff347f1b505c2c4d47b773f.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_off00005409.bin
96437d8bcf1ab4c09d4edf9f6bc59e719e4d4de60ad558205d8d8189b9df18e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5409 5308 bytes
font_01_sfnt_off00006611.bin
41223922811e16515b79708d83c15da49826dd0bbf6298b9ac296e5c1e5b543f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6611 10424 bytes