Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a54110e8355412…

MALICIOUS

PDF

41.6 KB Created: 2020-08-18 19:07:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0d6759847eafde5581088f26c9e4ae5 SHA-1: 6ed447301fc3e682b3dad7f64fe6892d81a37356 SHA-256: 25a54110e8355412cb39013b8ecf4ee8d4c22f208fffc00348805a31bd0b58c9
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to other PDF files hosted on Shopify. One of these links, however, redirects to a known malicious domain (ttraff.com). This suggests a phishing or malicious redirection attempt, likely designed to lure users to malicious content or exploit kits. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact lure.

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/pify?keyword=can+you+bleach+egyptian+cotton+sheets
    • http://files.rinatoshop.com/uploads/1/3/0/7/130739949/gijurak.pdf
    • http://files.owencountyfair.com/uploads/1/3/2/3/132303175/ee90efa42.pdf
    • https://cdn.shopify.com/s/files/1/0440/7528/6693/files/91169460970.pdf
    • https://cdn.shopify.com/s/files/1/0434/9083/6645/files/91338330185.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/40945989486.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/3863138992.pdf
    • https://cdn.shopify.com/s/files/1/0434/1376/6293/files/anaphylaxis_guidelines_nz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8604/4572/files/kufawuwexifamod.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7414/files/53727677178.pdf
    • https://cdn.shopify.com/s/files/1/0427/8219/5879/files/siganuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/44819559305.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/91105189269.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/apple_preview_add_text_to.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_off00006450.bin
bca97125e86b4b4b5e97b3fb91e1590ea72c205fa94ab918b8904b218078ee6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6450 5248 bytes
font_01_sfnt_off0000762a.bin
e4ed8f80213715addd327f6ed5a1023d02e9aecad9ec208128fe023c4dfd5260
pdf-font-stream PDF embedded font (sfnt) at offset 0x762A 10340 bytes