Malicious PDF — malware analysis report

Static analysis result for SHA-256 094b83bcc1b6f51d…

MALICIOUS

PDF

44.5 KB Created: 2020-08-31 07:22:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e69d61c735d33df6befd70212ca02897 SHA-1: a6d9176b923ec9fc5448b1c743ea40a9ae15b94e SHA-256: 094b83bcc1b6f51d1955f3e992b75a79c13c9fe613c27d704eacaf1146cff646
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm of numerous PDF documents, with one primary link pointing to a known malicious redirector. This suggests an attempt to lure users into clicking through to malicious content, likely for phishing or malware distribution. No scripts were extracted, and the document body was heavily obfuscated, making further analysis of intent difficult.

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=carthago+delenda+est
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/8389642311.pdf
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/66320001978.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/wodiparip.pdf
    • https://cdn.shopify.com/s/files/1/0461/6405/0083/files/zoopla_property_group_annual_report.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0756683521443d286b7d737e6dc60a6.pdf
    • https://static.usrfiles.com/ugd/5b9365_4c29076dbbd8401ba7a009a531282608.pdf
    • https://static.usrfiles.com/ugd/9b5f63_c1cc367315c8486b8a4139ba0ff46b8d.pdf
    • https://static.usrfiles.com/ugd/269bb8_ee3ac6978c6a4cebadf6a9311c67c219.pdf
    • https://static.usrfiles.com/ugd/82e28d_cf0ff996f951411e871beeff800cf4ec.pdf
    • https://static.usrfiles.com/ugd/d54300_76eeabf43e6945758d7ddd9038185981.pdf
    • https://static.usrfiles.com/ugd/ca300b_303cdb77ad1d49158045ad8573150f4e.pdf
    • https://static.usrfiles.com/ugd/f523c3_f5458ac4569541b1ab3dd35bd3ed1b31.pdf
    • https://static.usrfiles.com/ugd/07625c_55cf049bdb56454ab8effe54e8be7535.pdf
    • https://static.usrfiles.com/ugd/3615fb_18f1bf9e84844288b5f19ebeabeb650d.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_off000069f5.bin
c152905f57d9470d1be873368e4379a35c5b850bb5339c47c7c149c8e9e84549
pdf-font-stream PDF embedded font (sfnt) at offset 0x69F5 4992 bytes
font_01_sfnt_off00007ae5.bin
7a558fc2cc834071a3575b13a87e314913162b73b3e3bb4276109f29b58babed
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE5 13500 bytes