Malicious PDF — malware analysis report

Static analysis result for SHA-256 4574852311a80e3d…

MALICIOUS

PDF

37.8 KB Created: 2020-08-20 11:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61f8322c79015981b4ae9f5afcbff7f5 SHA-1: 7789beb10d0eed9a49b2736cdb85faea3d94c96c SHA-256: 4574852311a80e3db2754d60e856ef4e917decffb1fd987f1b533f011118f8aa
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Android studio show project files' and the malicious URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute the malicious 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.com/pify?keyword=android+studio+show+project+files
    • http://files.sshschoir.com/uploads/1/3/1/8/131856160/degugeniriz.pdf
    • http://files.taradoodles.com/uploads/1/3/1/1/131164425/wokajekeren_panurer_geviwu.pdf
    • http://files.crandallcustomhomes.com/uploads/1/3/1/4/131438642/6400142.pdf
    • http://sorimuzik.themunrosofglenorrin.com/uploads/1/3/1/6/131636725/8380184.pdf
    • http://files.usecuniversity.com/uploads/1/3/1/3/131380440/93845.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8231/files/juluvawefiminajigudifaju.pdf
    • https://cdn.shopify.com/s/files/1/0429/8817/5519/files/gezevaponiwipimew.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/juvixaduguvuzelurena.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/43775487563.pdf
    • https://cdn.shopify.com/s/files/1/0437/1926/2357/files/99316316048.pdf
    • https://cdn.shopify.com/s/files/1/0447/4676/8535/files/the_new_encyclopaedia_britannica_15th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/5301/3409/files/87046897391.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pigirerunozekolufis.pdf
    • https://cdn.shopify.com/s/files/1/0444/1328/8614/files/total_thyroidectomy_procedure.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_off00004a82.bin
6a84d14dd815e1e718b52a3032988a49eb9cb586ccaa0afa4499135b38cf011c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A82 5072 bytes
font_01_sfnt_off00005bcd.bin
47b0b39cc75c4995c881bea567c3b783b0b88afacf114834e077fcbd2dcb5421		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCD 9560 bytes
font_02_sfnt_off00007c55.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C55 4324 bytes

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