Malicious PDF — malware analysis report

Static analysis result for SHA-256 84674665af63725e…

MALICIOUS

PDF

42.2 KB Created: 2020-08-30 09:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84d6080633c4d22c5bfa82d9413478ea SHA-1: 1308b205bd9b69c3989bc98ac212a75364a1d952 SHA-256: 84674665af63725ea213a65dd0add20e0c8734d8a1eeed0a103c231c51d43e81
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to distribute malicious content or phish users. The presence of embedded URLs and the malicious redirector suggest an attempt to lure users to malicious sites.

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=domaine+continental+et+sa+dynamique
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8581/6217/files/62522314873.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2808/files/zetuzajej.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/sleep_hygiene_in_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0432/0693/4696/files/86257859931.pdf
    • https://static.usrfiles.com/ugd/b8c837_559675a73b904d7ba612f4eb3e05f2b7.pdf
    • https://cdn.shopify.com/s/files/1/0440/6460/4310/files/68399223416.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/gegetibemugudumi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/scratch_2_game_project.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/95019577247.pdf
    • https://cdn.shopify.com/s/files/1/0434/1963/1765/files/83188601170.pdf
    • https://cdn.shopify.com/s/files/1/0428/6310/0070/files/25282752725.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3525/files/freebox_bloqu_tape_6.pdf
    • https://cdn.shopify.com/s/files/1/0436/8737/9094/files/arduino_uno_specification.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_off00006553.bin
5ea942dfe4335669e6d3a9bbd87d9d6ec9148f3a15298703c0ba7123369f8b7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6553 5216 bytes
font_01_sfnt_off000076fd.bin
130c16fccf4d44bbaab3446f27dc057a4f8f307eacb107d435ddcde067ac3902
pdf-font-stream PDF embedded font (sfnt) at offset 0x76FD 11444 bytes