Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00f27a0faa358a2…

MALICIOUS

PDF

47.1 KB Created: 2020-08-18 17:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dc633d0301df8b78fecf421cf3bf913 SHA-1: ced1c968906c7f2db665f7fda2c7120bf720a50e SHA-256: b00f27a0faa358a2caf2d8a00618db3fdd8f9317908435881e28c39bf97b96d8
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain, ttraff.com. This suggests a link farm or SEO poisoning attack designed to funnel users to malicious infrastructure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack vector is the malicious redirection.

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/pify?keyword=ama+citation+generator+pdf
    • http://files.pencilartistbobbygoldsmith.com/uploads/1/3/1/4/131453276/bomoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/1216/1685/files/94154913384.pdf
    • https://cdn.shopify.com/s/files/1/0437/3626/8949/files/bayonetta_2_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/vitebaxonen.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/pevamabi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5767/files/tatekumajufokekalivudig.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8072/files/69255243659.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3574/files/56370607698.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/22724495363.pdf
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/tabla_de_verbos_auxiliares_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0434/4496/1442/files/kosuxojoxiraroru.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_off00007acc.bin
c15a1aba74cedef52789caf87dc94a895feb0b5cfc17ad439cf56f513a93558a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACC 5256 bytes
font_01_sfnt_off00008c8a.bin
e241836a9a90ff6dd5fc970c76e0b57d1d09661e386ea2fa080de4c498deb8f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8A 10352 bytes

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