Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e7edbff70f493a3…

MALICIOUS

PDF

37.5 KB Created: 2020-08-14 13:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7629350444bff2fe4d12f41a6c29583e SHA-1: 29678b85df10521df2cfef528ac215e0ce7fe1bc SHA-256: 4e7edbff70f493a3f6afb4ba520f19eb1cd2b962adc4db3081df1d967d1eed51
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a high number of embedded external links, a common tactic for SEO poisoning or phishing campaigns. The primary malicious URL identified is a redirector service, which likely leads to further malicious content or phishing pages. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the direct user-facing content.

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.cc/pify?keyword=chemische+formeln+mit+latex
    • http://files.nekrubs.com/uploads/1/3/2/6/132681690/990145f2bb7.pdf
    • http://files.gchumsoc.org/uploads/1/3/0/7/130775747/f03d2fa.pdf
    • http://files.relmeng.com/uploads/1/3/0/8/130814127/wovabapebi-lumofibudoz-pipazuni.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/allegra_pediatrico_bula.pdf
    • https://cdn.shopify.com/s/files/1/0435/9516/9950/files/fufikebajomogulunen.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7110/files/31568514726.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20675343362.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/29131656052.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5258/files/skyrim_se_parallax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdf
    • https://cdn.shopify.com/s/files/1/0433/9472/8103/files/autopilot_mode_technology_in_vehicles.pdf
    • https://cdn.shopify.com/s/files/1/0450/1949/6606/files/panasonic_ne-_1054f.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/49113329544.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/94032815719.pdf
    • https://cdn.shopify.com/s/files/1/0434/5407/0951/files/dexerisiviw.pdf
    • https://cdn.shopify.com/s/files/1/0434/7530/4612/files/sutubusu.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_off00005238.bin
59deca3c52d19371521c1c54b5c7a013a221b9a648bffd4007aada1c31519f2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5238 5096 bytes
font_01_sfnt_off0000635d.bin
794bb71bb25c6a7361d2c48b65a9abee5795852e3f1ee4d114b558197c25ac0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x635D 11596 bytes

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