Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2f843211379ac3…

MALICIOUS

PDF

39.4 KB Created: 2020-08-29 23:39:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eed4e1dec2d9936c474fb6010f9dae73 SHA-1: 0e9ff5101d40a60edd3fd4d3ef855403b32619c8 SHA-256: 2d2f843211379ac31f26ab07b2b7b93e5238d8c1b8850e5f44531ea649789bd8
152 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a link farm containing numerous external links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=sbl+footnote+citation', which is flagged as a malicious redirector. The primary purpose appears to be directing users to potentially harmful content through a network of links.

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.ru/wix?keyword=sbl+footnote+citation
    • https://cdn.shopify.com/s/files/1/0436/7450/1273/files/kuttyweb_movies_2019_tamil_movie_tamilrockers.pdf
    • https://cdn.shopify.com/s/files/1/0432/4311/0555/files/14920198992.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/83160271576.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cd3d2001f3f4b24a3b17dcfecd18bb8.pdf
    • https://static.usrfiles.com/ugd/b8c837_d522fef8a48d4e3282b1f9b59ca8513c.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e04610e10ff46a4b195ffd7d0581162.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e0065230e734c89bf394a82127e6c96.pdf
    • https://cdn.shopify.com/s/files/1/0434/0210/0886/files/kathi_mela_kathi_cut_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0436/7931/8166/files/bossard_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/29855984392.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jokesinoximirupabujikupoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7723/8945/files/being_in_balance_wayne_dyer.pdf
    • https://cdn.shopify.com/s/files/1/0434/1563/4071/files/akuntansi_perpajakan.pdf
    • https://cdn.shopify.com/s/files/1/0465/3380/4182/files/sikevanukegikife.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_off000058bc.bin
331557e4352590480d7d64e6738bc14c935c36e71a15745e9ff2bb54bf2ba2d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x58BC 4844 bytes
font_01_sfnt_off0000694a.bin
2ca6ba36b9ce2d0bc2b92077f44dd37cf25ded0e68dad3494a1b55b2d52d727d
pdf-font-stream PDF embedded font (sfnt) at offset 0x694A 11368 bytes