Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b050c3e81324e14…

MALICIOUS

PDF

41.3 KB Created: 2020-08-06 23:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d1237d7c8e3eb19497bbc93bb1e9516 SHA-1: 2db6e07710d9e1b1bdc8e91f25e4b1a0d878c102 SHA-256: 2b050c3e81324e14e97694304489a1621c30e1acd318278800ba928459fda9bf
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=physical+therapy+for+frozen+shoulder+exercises+pdf'. This suggests the document is designed to lure users into clicking malicious links, likely leading to further malware downloads or phishing attempts. The presence of numerous Shopify links, while some are benign, contributes to the overall link farm characteristic.

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.cc/pify?keyword=physical+therapy+for+frozen+shoulder+exercises+pdf
    • http://files.carstensindustries.com/uploads/1/3/1/3/131379692/1643548.pdf
    • http://files.jhestekin.com/uploads/1/3/0/8/130813698/9311132.pdf
    • http://files.longosfinancialmarket.com/uploads/1/3/1/3/131398338/boboku.pdf
    • http://files.oldmillallentown.com/uploads/1/3/1/0/131071252/6fe58f1f3eea.pdf
    • http://rinugim.sarasotavirtual.com/uploads/1/3/1/4/131453850/7793447.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23313492251.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3042/files/fexerad.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8892/files/85857157622.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/jeketeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/era_paleozoica_y_sus_periodos.pdf
    • https://cdn.shopify.com/s/files/1/0436/4645/1862/files/rejugusobafomumitiwu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4645/2899/files/la_enfermedad_de_alzheimer_diagnostico_y_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/tofik.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/watof.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/4541914283.pdf
    • https://cdn.shopify.com/s/files/1/0433/1733/0075/files/helping_linking_and_action_verbs.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5886/files/zidofinodix.pdf
    • https://cdn.shopify.com/s/files/1/0431/1079/3370/files/66624642492.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/4036863675.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_off00006432.bin
b6a6f1306e4fe39889a1199eaa6bd7fd01577bf3b96fd296fd5aecaf9ddfa36a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6432 5464 bytes
font_01_sfnt_off000076db.bin
2543bf91df6605f4e91be820c1e0c9ad12b54d64929c3047944bad89ab8f3399
pdf-font-stream PDF embedded font (sfnt) at offset 0x76DB 9688 bytes