Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbddd82c914b1029…

MALICIOUS

PDF

41.1 KB Created: 2020-08-11 01:42:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9c5cd0a2d71756f5f2affffc130eaf3 SHA-1: ac4a96f6b60188cd99b74baf013b53778fdfa797 SHA-256: dbddd82c914b10298816fe7c1ce839de96858f768ff019b430b42f522638810c
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggered this finding. The presence of numerous external links, many pointing to Shopify domains, suggests a link farm or redirection strategy. The primary malicious IOC is the ttraff.com redirector URL, which likely serves as a gateway to a phishing or malware distribution page.

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=bostik+greenforce+pdf
    • http://files.teplomart.cz/uploads/1/3/0/9/130969981/zusobi.pdf
    • http://files.scholacincinnati.org/uploads/1/3/2/6/132681836/wapikafijuje_powoked_vijalorozoxo_metawukub.pdf
    • http://files.neslle.com/uploads/1/3/0/8/130874381/7805866.pdf
    • https://cdn.shopify.com/s/files/1/0436/9825/8088/files/99118050767.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7934/files/51077724533.pdf
    • https://cdn.shopify.com/s/files/1/0436/1958/2110/files/38748838291.pdf
    • https://cdn.shopify.com/s/files/1/0431/0525/5577/files/luzilibuwodomuwube.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1885060089.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/fupabejiwutesumiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/vobipaje.pdf
    • https://cdn.shopify.com/s/files/1/0441/0051/8040/files/bigidapopuledola.pdf
    • https://cdn.shopify.com/s/files/1/0440/0683/4334/files/asymmetric_information_market_failure.pdf
    • https://cdn.shopify.com/s/files/1/0435/8583/1080/files/22752068712.pdf
    • https://cdn.shopify.com/s/files/1/0435/0545/1174/files/68166080441.pdf
    • https://cdn.shopify.com/s/files/1/0429/4452/8550/files/thermal_physics_kittel_2nd_edition.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051c0.bin
19fe6d3511270ee3ff4fbce704f5f4a9fb9182a4344e37e40a38d55828b07e20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51C0 3312 bytes
font_01_sfnt_off00005da1.bin
2fa23d496d18e927d6caaddef628aafc4b09b0deb11f6d033113077036b86a2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA1 5196 bytes
font_02_sfnt_off00006f61.bin
0e2c7a525933f066e6d145c6a314be20b7aa3aa931e0d1b6923955c25af415b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F61 12468 bytes

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