Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f1ab2cfe471a1e5…

MALICIOUS

PDF

44.6 KB Created: 2020-08-02 20:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1a11444b26b0fc9ce70b102fb4712a4 SHA-1: 2ff2ae7a7ee7fee686a681afc34e7dd55f07b237 SHA-256: 3f1ab2cfe471a1e54d0ca070a5b98eefaaf7395ac058cf1380cd01c1231f0075
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large farm of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. One of the primary URLs, 'https://ttraff.ru/pify?keyword=carol+of+the+bells+tab', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=carol+of+the+bells+tab
    • http://files.tiffanyfewel.com/uploads/1/3/2/6/132682820/gixewasamumorex.pdf
    • http://files.literallyanythingmovies.com/uploads/1/3/0/7/130775134/zosase.pdf
    • http://files.halfacrestudios.co.uk/uploads/1/3/1/3/131383924/5693121.pdf
    • http://files.eudaimoniatravelblog.com/uploads/1/3/1/3/131380592/wimajuxewig.pdf
    • https://cdn.shopify.com/s/files/1/0432/3675/3570/files/mipebanisiwibewegomazol.pdf
    • https://cdn.shopify.com/s/files/1/0432/2813/5591/files/tx_surcharge_indigent_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1616/files/83752496175.pdf
    • https://cdn.shopify.com/s/files/1/0439/7439/4014/files/28744974428.pdf
    • https://cdn.shopify.com/s/files/1/0428/5431/8239/files/jebojafunomidazos.pdf
    • https://cdn.shopify.com/s/files/1/0435/4991/7333/files/69024695405.pdf
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/rolofomogizezil.pdf
    • https://cdn.shopify.com/s/files/1/0434/0475/5096/files/fuvenemupalekapusulivol.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6693/files/numuxejopitedelem.pdf
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/damimokidono.pdf
    • https://cdn.shopify.com/s/files/1/0434/2710/2876/files/wagusuwuxelosowoputa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/19202928519.pdf
    • https://cdn.shopify.com/s/files/1/0433/7002/1014/files/luxawas.pdf
    • https://cdn.shopify.com/s/files/1/0429/8014/7359/files/nuseruvaja.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d86.bin
91ddb8544079de4cca3add23e0dbda5132c7da30ca75eed9f58d06763d13415a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D86 4652 bytes
font_01_sfnt_off00006d6c.bin
1506f5ce10cf4700c0d77e2a4df8ac1d8cd236ab59fd359bf047c795bfeacd1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6C 13144 bytes
font_02_sfnt_off00009774.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9774 4324 bytes