Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e9839d156c427a…

MALICIOUS

PDF

42.3 KB Created: 2020-08-29 05:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 747817f77c0c4b3ae6273bfa4c065377 SHA-1: dcfc9cceb7c7e651f9e7f9b5c3ae25bf1e1ad37b SHA-256: 05e9839d156c427a08cbf49206dc8bb297ff3f214b4d2aef58b78d2901958934
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, identified as a link farm, with one prominent link pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of the malicious redirector URL suggests an attempt to lead the user to a malicious site, likely for phishing or malware distribution.

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.com/wix?keyword=pertahanan+coc+th+6
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2001/6024/files/damilirajawaluzexi.pdf
    • https://cdn.shopify.com/s/files/1/0448/4674/3709/files/48140397845.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27622062760.pdf
    • https://cdn.shopify.com/s/files/1/0438/2156/4066/files/18499064222.pdf
    • https://cdn.shopify.com/s/files/1/0428/7863/2095/files/arduino_ultrasonic_sensor_project.pdf
    • https://cdn.shopify.com/s/files/1/0438/3653/9045/files/82050933773.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4070/files/72697961733.pdf
    • https://static.usrfiles.com/ugd/b8c837_c1920bac43bc4cbc9166c3adc1abea13.pdf
    • https://static.usrfiles.com/ugd/b8c837_8827c12f9d7a409fa60c8322755e3de4.pdf
    • https://static.usrfiles.com/ugd/b8c837_af2e41115c5e43e69514f13eb34da4bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d24675b4c5149198d1408813808f92c.pdf
    • https://static.usrfiles.com/ugd/b8c837_afe367ecf4234bd88a9debb35fa7dd6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5fddef02037449ab386570039cce41f.pdf
    • https://static.usrfiles.com/ugd/b8c837_80cac8eeca774c5aaaac7f0051ac1ef8.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_off00006836.bin
6efe0eaf17c4b495b72c83fab5417ff20f28c86cb900b615033f2ffbc6cb536f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6836 4832 bytes
font_01_sfnt_off0000788e.bin
315f4ab4dce66b92f193b51a4b05e0e41e1065395ce99203279c4d5d640acaa4
pdf-font-stream PDF embedded font (sfnt) at offset 0x788E 10668 bytes