Malicious PDF — malware analysis report

Static analysis result for SHA-256 855533de2784f514…

MALICIOUS

PDF

44.0 KB Created: 2020-08-22 20:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e02a830bd2daaad49088e0d856bedd97 SHA-1: 8fc944d10a928a69e00c040fe738e5ff69a6cb44 SHA-256: 855533de2784f5140458466897f3243cb1b907747f033c912af97d266b4dac65
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with the primary URL identified as a malicious redirector. The ML classifier strongly indicates maliciousness, and the presence of numerous links suggests an attempt to manipulate search engine results or distribute payloads. No scripts were extracted, but the PDF structure itself is indicative of 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/pify?keyword=automated+guided+vehicles+future
    • http://files.bluecanyonceramics.com/uploads/1/3/1/4/131437363/6417f5025.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9553/9368/files/97855589184.pdf
    • https://cdn.shopify.com/s/files/1/0432/7365/0334/files/righteousness_of_god.pdf
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/fopune.pdf
    • https://cdn.shopify.com/s/files/1/0429/3135/5807/files/feroz_ul_lughat_arabic_to_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/pixakogoje.pdf
    • https://cdn.shopify.com/s/files/1/0431/6787/5221/files/bls_basic_life_support_provider_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6941/files/22107561272.pdf
    • https://cdn.shopify.com/s/files/1/0432/0146/2436/files/40059665862.pdf
    • https://cdn.shopify.com/s/files/1/0434/7861/4168/files/22522655471.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/cementum_caries.pdf
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/geloxur.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0118/files/22632690648.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65529241957.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b07.bin
ece6e93f73a571d4f1b6f0c0d42b066e502aabb3b366240f7e14fb1906e5377b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B07 5484 bytes
font_01_sfnt_off00007d90.bin
5f53bfedd16f3cefb000bc818585eb8a0879edc72d1a80db1ce26e7466495ebc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D90 10868 bytes