Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c59ceefa25ffcea…

MALICIOUS

PDF

49.3 KB Created: 2020-09-08 03:40:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5aa1a5fb2d593ac345047136e9d4ab7 SHA-1: f0fbf83cc8d1213c7f6a8e204161da4d7f0398b8 SHA-256: 5c59ceefa25ffceaa82ae23062e0b9ce760c144d2757836319dad70eb9d5c5c0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one prominent URL leading to a redirector infrastructure associated with malicious activity. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Filmora templates birthday' and the malicious URL. The presence of numerous external PDF links, many pointing to user-uploaded content, indicates a potential link farm or SEO manipulation tactic to drive traffic to malicious sites.

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.club/wix?keyword=filmora+templates+birthday
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/9ef1ea_42ee8d6687ee4f8fa47efcd00beed029.pdf
    • https://static.usrfiles.com/ugd/185811_8fc350494e5a4cfcbb8ff4037e34fad7.pdf
    • https://static.usrfiles.com/ugd/fc3b0b_78f65114db734ee1ae212860ce5efab8.pdf
    • https://static.usrfiles.com/ugd/0df15e_812a95c57a4b4aa79ea5e15247c67059.pdf
    • https://static.usrfiles.com/ugd/3e5d97_e5282dc2cf7b422ea395e1467053906d.pdf
    • https://cdn.shopify.com/s/files/1/0434/1157/0838/files/17202884122.pdf
    • https://cdn.shopify.com/s/files/1/0430/0872/1045/files/43325118670.pdf
    • https://cdn.shopify.com/s/files/1/0429/1090/8572/files/78389886386.pdf
    • https://static.usrfiles.com/ugd/ace02d_1efb4a2d65b84b188e6643c7b37a1052.pdf
    • https://static.usrfiles.com/ugd/544e7e_5e00beb1fba84b3eb768287b7cf07e36.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/57500570041.pdf
    • https://cdn.shopify.com/s/files/1/0431/1072/7841/files/99975101646.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_off00008279.bin
e7b21daf0b5c39cc46c6d256bad3b20cba904ee01b871f0a1e7f011e82d4745f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8279 5396 bytes
font_01_sfnt_off000094a1.bin
bcc56022aa8208c38fd77775d50774606157bf94bdd425641b9a061e6deefe4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x94A1 10476 bytes