Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1a7d0bb31e10316…

MALICIOUS

PDF

42.3 KB Created: 2020-09-01 00:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12dfc2b8d643868bcb7ef8419aa2f255 SHA-1: 144baaf04593f1daccebf4efc238d1200c5bf660 SHA-256: d1a7d0bb31e103165556b353fc58bd28fa812e47dfb79a6b5d8920eb4a433fae
152 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which points to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, appears to contain text related to a "Champion generator operating manual", suggesting a lure to entice users to click the malicious link. The presence of a large number of external PDF links, many hosted on Shopify, indicates a potential SEO poisoning or link farm strategy to distribute the malicious content.

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=champion+generator+operating+manual
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/nipididodowelemike.pdf
    • https://cdn.shopify.com/s/files/1/0431/3474/6790/files/checklist_template_for_child_observation.pdf
    • https://cdn.shopify.com/s/files/1/0431/4936/1314/files/3770142153.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/63384266769.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/angka_dalam_bahasa_arab_1_1000.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vibemegabixowosepabotabux.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/37699529177.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/teduxodewujul.pdf
    • https://cdn.shopify.com/s/files/1/0433/2165/5464/files/movusutiru.pdf
    • https://static.usrfiles.com/ugd/6f7357_6d6be57d273b4f4e99696805cd496d61.pdf
    • https://static.usrfiles.com/ugd/b42fd6_cc42919ced2d452cb7dae719c0d7b397.pdf
    • https://static.usrfiles.com/ugd/b8c837_ada084d37453491c81c6fd609163feab.pdf
    • https://static.usrfiles.com/ugd/db1da1_78593b73ead742cf8ba090661b264a45.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_off00006808.bin
da50d788da6927c871d4e0bb8b36b7dc21c3b21cb37080f7569e363900640e28
pdf-font-stream PDF embedded font (sfnt) at offset 0x6808 4960 bytes
font_01_sfnt_off000078b8.bin
3f26b7552def27b05ed8314b209c4e3bc7396bbdc207b2a4fbc75e8dc845e461
pdf-font-stream PDF embedded font (sfnt) at offset 0x78B8 10312 bytes