Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb8624be426f5f4…

MALICIOUS

PDF

35.9 KB Created: 2020-08-29 06:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eabe6b42d5fd16e8fa7769357351b5ac SHA-1: 42045f40ae4822577ed47aadbc3e3fdf6d04b142 SHA-256: 9eb8624be426f5f4abb389116dbfbb142bbf5fa55a71ae8402bee2ba7eadcc03
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=slqh+patricia+se+caem'. Additionally, it exhibits a PDF link farm heuristic, with numerous links hosted on cdn.shopify.com, suggesting an attempt to obscure the final destination or distribute content. The ML classifier strongly flagged this PDF as malicious. The document body contains garbled text but includes the same redirector URL, reinforcing its 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.cc/wix?keyword=slqh+patricia+se+caem
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/43117646549.pdf
    • https://cdn.shopify.com/s/files/1/0434/9011/5748/files/petuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/pugutajubesorokefime.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/76021805482.pdf
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/9130526962.pdf
    • https://cdn.shopify.com/s/files/1/0432/0172/4580/files/9518494909.pdf
    • https://cdn.shopify.com/s/files/1/0433/5845/3928/files/kupavemorozusotoloze.pdf
    • https://cdn.shopify.com/s/files/1/0429/5363/8044/files/nizapolejimotu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdf
    • https://cdn.shopify.com/s/files/1/0438/8651/0232/files/sovevunasivumigifirarer.pdf
    • https://cdn.shopify.com/s/files/1/0433/7863/9013/files/2406885266.pdf
    • https://cdn.shopify.com/s/files/1/0438/9853/6091/files/pobavosuvikeziwi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7976/1061/files/21519139671.pdf
    • https://cdn.shopify.com/s/files/1/0434/2916/7270/files/dokatiluxakini.pdf
    • https://cdn.shopify.com/s/files/1/0434/7589/4437/files/oa_brotherhood_ceremony_script.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/bangsamoro_basic_law_senate.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_off00004daa.bin
003b189883a1e6be07c8b8386f9bd5dda0a3ef45eb649b3be05eb8f97678c439
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DAA 5400 bytes
font_01_sfnt_off00005fe3.bin
cb6e41e538d7b7158f51e9a5d490bb1b6aa1385aaa4eb7780e4f3f66f23a726b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE3 10276 bytes