Malicious PDF — malware analysis report

Static analysis result for SHA-256 986724f174e41cd6…

MALICIOUS

PDF

47.7 KB Created: 2020-08-05 11:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dd2b3f37e36075dbd3eb8547b6027d7 SHA-1: c42f5a91b319f5425ad1ac9303740373dac57f2d SHA-256: 986724f174e41cd62405c0ef3417e7518b98194d21f1e8cf8a2f0b3e5c492535
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains text related to 'free asvab study guide 2020 pdf' and the malicious URL 'https://ttraff.ru/pify?keyword=free+asvab+study+guide+2020+pdf'. This suggests a lure to a malicious site, likely for phishing or malware distribution. No scripts were extracted from this sample.

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.ru/pify?keyword=free+asvab+study+guide+2020+pdf
    • http://files.thirdcoastdiscs.com/uploads/1/3/0/8/130814666/4cf7a4ebf27f.pdf
    • http://files.multimodalresearchteam.com/uploads/1/3/2/7/132710779/8287552.pdf
    • http://files.ifbiblechapel.org/uploads/1/3/0/8/130873787/64c0b48d932c.pdf
    • http://files.goodworthclatford.com/uploads/1/3/1/8/131856293/6254736.pdf
    • https://cdn.shopify.com/s/files/1/0447/5063/5162/files/dennis_rainey_preparing_for_marriage.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59022585862.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93434530871.pdf
    • https://cdn.shopify.com/s/files/1/0429/5370/3580/files/final_wishes_organizer.pdf
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/23792361461.pdf
    • https://cdn.shopify.com/s/files/1/0434/5341/5576/files/xazolukezu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7149/5574/files/xofidina.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/jabakobakubexusoxirudeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/sodifevogapuzo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/dowixupumozibavizezajepel.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_off00006db5.bin
3971b9fb59dc3a350cf1c1279d3d8d1ae7d729c7ee58d1cdc598b51c83b5e8d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB5 5372 bytes
font_01_sfnt_off00008018.bin
b0143fe6c579dcbc8749f90a21862532e0ceda76b78bfb7a93b5c8f15ac20d3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8018 10516 bytes
font_02_sfnt_off0000a3bf.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3BF 4324 bytes

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