Malicious PDF — malware analysis report

Static analysis result for SHA-256 154cd1c91dce6d94…

MALICIOUS

PDF

41.1 KB Created: 2020-08-30 10:36:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60bd30798331cc5b54cc803962ae2daf SHA-1: c9f5cb8f4f8630a132f82dd90e2a85f29e4894a0 SHA-256: 154cd1c91dce6d943ea10c2f501c84c9b7650e455c55c8fbf32ac13acb99d729
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a document title, which redirects to a malicious domain (ttraff.com). This indicates a phishing or malware distribution attempt, likely delivered as a spearphishing attachment. The PDF structure and embedded links suggest it's part of a link farm designed to distribute 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.com/wix?keyword=contexto+social+de+don+quijote+dela+mancha
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/2e79a6_a15408d1c16a4354beab4cd3af3b19ca.pdf
    • https://static.usrfiles.com/ugd/804ff6_efaf939be5e74b09b3e02e748e04d958.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c183f253f8f4238940474038910a9e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_75afd577666840c1b0fdeee4ffab9cbf.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7c1df167c7144dcb2e091af2a92c45b.pdf
    • https://static.usrfiles.com/ugd/b8c837_080ec4ffa03b4f358c3fdd87102182c3.pdf
    • https://static.usrfiles.com/ugd/05900a_98a16bafbc694669b776aec8f5da8d28.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/sipilalojufepamosololum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9629/4051/files/atlas_of_amputations_and_limb_deficiencies_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/2427/7923/files/lefugovanoka.pdf
    • https://cdn.shopify.com/s/files/1/0428/8783/9910/files/7039076267.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2261/files/halimbawa_ng_aksyon_na_pananaliksik.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_off00006411.bin
890b31b2319d159de5ceb1a2111fe57b1ffdf8946f29a53d384632bedf562c64
pdf-font-stream PDF embedded font (sfnt) at offset 0x6411 5256 bytes
font_01_sfnt_off000075c9.bin
81a4690f8fa0a61255ec1bbd98b1fe1959eb5b6857564d85ecd36cb1a253e543
pdf-font-stream PDF embedded font (sfnt) at offset 0x75C9 9800 bytes