Malicious PDF — malware analysis report

Static analysis result for SHA-256 017cdd51998de8bb…

MALICIOUS

PDF

44.3 KB Created: 2020-07-13 03:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aff2d512a250a82724fa629f1eb84d9f SHA-1: 0d8eea07be72a7e747fd182bd3204e0582812cc9 SHA-256: 017cdd51998de8bb96c546120934937f19d938c7e81b5e6692edf404b11332c0
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, directing users to potentially malicious domains. One critical heuristic specifically flagged a redirector link to 'ttraff.com', indicating a high likelihood of malicious intent. The ML classifier also strongly supported the malicious verdict.

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=samsung+5.+2+front+load+washer+reviews
    • http://files.southwesterngmtc.com/uploads/1/3/1/8/131856079/d7a3140bf.pdf
    • http://files.volkerspatchcollection.com/uploads/1/3/1/3/131379700/a55d09d51475.pdf
    • http://files.georgia-sabatier.com/uploads/1/3/1/4/131437813/26e055230289019.pdf
    • http://files.bridlewiseridingacademy.com/uploads/1/3/1/3/131383514/03f6a3eaeef5f.pdf
    • http://files.fatdtogo.com/uploads/1/3/1/1/131164311/puxuk_lazumub_mizilurefuziwo_patubajozaka.pdf
    • http://files.the-crazycucumber.com/uploads/1/3/0/8/130813663/lepitujet-ratovoma-mobutizodamosa-wazipilax.pdf
    • http://files.kakneslandscape.com/uploads/1/3/1/4/131406744/c435f12751035a2.pdf
    • http://files.mikehallviolin.com/uploads/1/3/0/7/130739180/270853b10.pdf
    • http://files.caterworldeventequipment.com/uploads/1/3/1/4/131413362/fabajaliwosum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://mirusafib.files.wordpress.com/2020/07/paboke.pdf
    • https://guxipuxego.files.wordpress.com/2020/06/xuvel.pdf
    • https://kugedabi.files.wordpress.com/2020/07/70462666659.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56966684837.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/80286186242.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/baruzulogakufokumusisuvo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/gopopezunixa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dewefezagabujam.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/99268493276.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/88487040432.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062e9.bin
b44a8261e1a1ec736943bea2b29511b9ffe9d03df70be5e85533530ce3a4d70f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62E9 5744 bytes
font_01_sfnt_off0000765e.bin
c2c4e908adbead731753295c954203536f4464f1eb9112d9e6f91dabd5dbe8b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765E 15100 bytes

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