Malicious PDF — malware analysis report

Static analysis result for SHA-256 e09e76faac1b1b0f…

MALICIOUS

PDF

39.3 KB Created: 2020-08-15 19:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a16ab6409d9f3ee2f47294443e2ed6df SHA-1: e44970ee4cd2ce5b9fd95a5f16223220166c7ef3 SHA-256: e09e76faac1b1b0f477907c44e9081c51c052565e37f0cc8bfcc77e13c674720
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to ttraff.com, which is flagged as malicious. It also exhibits characteristics of a PDF SEO link farm, with numerous links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same lure text and URLs as observed in the heuristics, suggesting an attempt to trick users into downloading further content or visiting malicious sites. The primary attack vector appears to be social engineering via a seemingly innocuous calendar PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wb?keyword=october%202019%20blank%20calendar%20pdf
    • http://files.abbaproperty.com/uploads/1/3/0/7/130740586/1702806.pdf
    • http://files.nalinikrishnankutty.com/uploads/1/3/0/8/130874128/mewajuluxojuvafox.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/dumur.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/bufejisoku.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/45220977837.pdf
    • https://cdn.shopify.com/s/files/1/0429/1356/2787/files/cmaa_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8567/files/87056237947.pdf
    • https://cdn.shopify.com/s/files/1/0433/8846/9411/files/16739370785.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/cs6_mac_keygen.pdf
    • https://cdn.shopify.com/s/files/1/0436/5107/2153/files/winston_mathematical_programming.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/34507295985.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/jejukebufigilaguseno.pdf
    • https://cdn.shopify.com/s/files/1/0431/8311/2341/files/asma_ul_husna_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0427/5660/4070/files/63102532776.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_off000059af.bin
23d3cdd2263889100894623989ca8bf5830862cc8e73f3668448d45387bd1f42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59AF 5684 bytes
font_01_sfnt_off00006d0d.bin
9be9e2328ce2d3ddfaae0a736a282efe5057a3bb739a56f1511e785408b6004f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0D 10536 bytes

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