Malicious PDF — malware analysis report

Static analysis result for SHA-256 e098b2d94318c8ee…

MALICIOUS

PDF

31.8 KB Created: 2020-08-30 09:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb79e28691b1fbeab5e5945231231f13 SHA-1: 69235a00652c88bfdb3e7b8c85ea280c7fb18792 SHA-256: e098b2d94318c8eed45f8b21368c267c66a813e8fd7a8a54bed150e1b9e79cf8
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF SEO link farm, with numerous embedded URLs pointing to various PDF files, many hosted on Shopify. The primary malicious URL identified is ttraff.com, which is likely used to funnel victims to a secondary malicious site. The document body contains garbled text but includes the malicious URL.

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=leica+captivate+user+manual
    • https://cdn.shopify.com/s/files/1/0461/9173/9033/files/template_undangan_walimatul_khitan_cdr.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3996/files/brand_equity_2018.pdf
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/febosatepe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/calaveritas_literarias_cortas.pdf
    • https://static.usrfiles.com/ugd/f0e51d_0a52f453fdbe43fab5eee2140767701e.pdf
    • https://static.usrfiles.com/ugd/8b49c6_9d6377810fba4e5e9970c7702ac9d85e.pdf
    • https://static.usrfiles.com/ugd/b8c837_43be3bc142ca4fbea274bbe945c4e436.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/lanuxodulakidapujefam.pdf
    • https://cdn.shopify.com/s/files/1/0438/8998/3640/files/jutabolojaw.pdf
    • https://cdn.shopify.com/s/files/1/0463/5367/8493/files/17790535846.pdf
    • https://static.usrfiles.com/ugd/f55bec_296fed8f78104d2ca6d9a77c64bae200.pdf
    • https://static.usrfiles.com/ugd/3826db_28da3f7babec4f1f9e046f4397fd728f.pdf
    • https://static.usrfiles.com/ugd/b8c837_fff7a2b6cdc04b4a86919b16fa7089a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9842a2897bf4bdc9bb74fe7f8ce7dda.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_off0000423a.bin
3ec642c6e7c5e0475c13b90d3f6bbc026d5d5ee9a915e4e587fac9f4c2a9b2fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x423A 5080 bytes
font_01_sfnt_off0000536f.bin
0bb26c8de2c75a57d60309ce2bf5062c8e13442860bd8fa5fc225c0165d70567
pdf-font-stream PDF embedded font (sfnt) at offset 0x536F 9144 bytes