Malicious PDF — malware analysis report

Static analysis result for SHA-256 da359fd8ed8fafad…

MALICIOUS

PDF

43.8 KB Created: 2020-08-07 19:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ff1dab4d410730e0165506d275cc99b SHA-1: 359adfe5f17870022da97031d693452c812ac70b SHA-256: da359fd8ed8fafadd41377efc5ce5960eaddbb9a1f0acd52e6dfc90b6d88bb9d
120 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, suggesting an SEO link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is disguised as a 'rational function graphing worksheet pdf'. This indicates a likely attempt to redirect users to malicious content, possibly for phishing or malware distribution. No scripts were extracted from this sample.

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.com/pify?keyword=rational+function+graphing+worksheet+pdf
    • http://files.ysgolpenyffordd.org/uploads/1/3/2/6/132682930/d70026a59c6d.pdf
    • http://files.gloverfamilymedicine.com/uploads/1/3/1/4/131454620/xalupovu.pdf
    • http://kabuj.nokillcolumbiamo.org/uploads/1/3/2/7/132740494/a7d534583af.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/46099733318.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/rewimolatelivosobiku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fofigez.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/86122573034.pdf
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/la_caccia_al_tesoro_camilleri.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/carte_du_monde__imprimer_avec_nom_des_pays.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3545/files/45160581681.pdf
    • https://cdn.shopify.com/s/files/1/0440/7967/7590/files/vugisa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7581/9927/files/vijebepepodogulate.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35022180152.pdf
    • https://cdn.shopify.com/s/files/1/0428/6405/0332/files/fopaxivefotedekowawob.pdf
    • https://cdn.shopify.com/s/files/1/0432/9255/7467/files/70457520911.pdf
    • https://cdn.shopify.com/s/files/1/0429/2739/0887/files/5808302836.pdf
    • https://cdn.shopify.com/s/files/1/0431/5653/7505/files/wepedekarelediw.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_off00005edb.bin
70ed64d6e35064e5464c16db7a648c9730d7a6c2ebe9e6acc2c403ca339543f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDB 3084 bytes
font_01_sfnt_off00006b96.bin
89fd88372d99646967970875e9ada921f9a3cc8ff032d1b52ba8da6d65d4b720
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B96 5580 bytes
font_02_sfnt_off00007ea9.bin
9ff2a382e38021d22098a671a9dcd7ba34659bb5d05796cf919863c72289b8a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA9 10344 bytes