Malicious PDF — malware analysis report

Static analysis result for SHA-256 d41045135737eb60…

MALICIOUS

PDF

44.4 KB Created: 2020-08-09 12:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5728d4178e8f4b8b5e8061efb0dfd8e6 SHA-1: 637e07032b41724cfb19444f209888a7e9e4287c SHA-256: d41045135737eb6073c903d378eaf94548200da90875db65ce98a915c0c97c1a
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to 'file allocation methods in operating system pdf'. The presence of a large number of external PDF links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to increase visibility and traffic to the malicious redirector.

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=file+allocation+methods+in+operating+system+pdf
    • http://files.paintandpartyindy.com/uploads/1/3/0/7/130740391/a939cc0463c57.pdf
    • http://files.northfieldrobotics.com/uploads/1/3/1/8/131871730/f70cef8d3f0c9c.pdf
    • http://koforovid.pacificnwinterclub.com/uploads/1/3/0/8/130874493/nutiwikarovas-virerivebopanab-zifoliva-lotezokuv.pdf
    • http://files.bwmart.pl/uploads/1/3/0/7/130740175/kajefapi.pdf
    • http://files.luckyhobo.com/uploads/1/3/1/3/131380992/kagus-wuwarilar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52209678420.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/puleloseluzuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/5353/1807/files/comment_apprendre_l_anglais.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47878122177.pdf
    • https://cdn.shopify.com/s/files/1/0438/6488/3355/files/vudelob.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8188/files/new_york_life_deferred_income_annuity.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/wanodabigenazawazavopaw.pdf
    • https://cdn.shopify.com/s/files/1/0440/1584/5541/files/45572016728.pdf
    • https://cdn.shopify.com/s/files/1/0430/9303/3111/files/66870172693.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/barupulalalodiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/4233/9992/files/nelson_s_pediatric_antimicrobial_therapy_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/pudadipopij.pdf
    • https://cdn.shopify.com/s/files/1/0433/7011/9318/files/contrato_de_anticretico_bolivia.pdf
    • https://cdn.shopify.com/s/files/1/0428/7909/0854/files/82392254193.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_off00006c54.bin
22b3864842ec5411f806c8a9ca0e279582541e8b43e2efc36e6cd303f219bc78
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C54 5628 bytes
font_01_sfnt_off00007f59.bin
05f7d768528fc3232c170b48473dae9a650f72cfada434c07607f94aeb1cdf39
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F59 10536 bytes