Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed296364ab65639a…

MALICIOUS

PDF

41.5 KB Created: 2020-08-29 14:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c637ea5192bbaea978c633146747b177 SHA-1: 74b1f930351f5b3aeebe91caa791b1a5d2467efd SHA-256: ed296364ab65639aaf161ab79e3f42e07ebc1d30fca79f0b557d29eb2461cd17
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links. One critical heuristic identified it as a malicious redirector link pointing to 'ttraff.cc', and another identified it as a PDF link farm with many links hosted on 'cdn.shopify.com'. The document body contains text related to a Bible reference and the tool used to generate the PDF, but the primary malicious activity appears to be the extensive use of external links.

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.cc/wix?keyword=thompson+chain+reference+bible+esv
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/brahm_kavach_path_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6012/6118/files/45843184156.pdf
    • https://cdn.shopify.com/s/files/1/0441/2047/3752/files/95987888533.pdf
    • https://cdn.shopify.com/s/files/1/0428/0811/5366/files/halflife_2_episode_2_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/5927805980.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3920/files/foloninufogaku.pdf
    • https://static.usrfiles.com/ugd/b8c837_95bde3f0ece449be9e72462082bb8498.pdf
    • https://static.usrfiles.com/ugd/b8c837_7df349b8dad545d58ed9b50e11a55cc5.pdf
    • https://static.usrfiles.com/ugd/b8c837_37c45fd240a541bcb1f82a62aa723d5d.pdf
    • https://static.usrfiles.com/ugd/b8c837_f233452c5c7f4ad3997400f5b8f625a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_daf473557cde4217b9b9c2eee6f07215.pdf
    • https://cdn.shopify.com/s/files/1/0434/0498/4474/files/hedwigs_theme_flute.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/laxefasigapabaxirasu.pdf
    • https://cdn.shopify.com/s/files/1/0447/1944/0028/files/51284866652.pdf
    • https://cdn.shopify.com/s/files/1/0428/9213/2508/files/zozerosikeluxovunitos.pdf
    • https://cdn.shopify.com/s/files/1/0428/1729/0406/files/11532376161.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_off000064d1.bin
6a81ad2e65f204db9e3b173ed96ab00ba73d7a2feef658756a278a97ad404f30
pdf-font-stream PDF embedded font (sfnt) at offset 0x64D1 5404 bytes
font_01_sfnt_off0000770b.bin
b5c7ce0d8e838d5c4e2d86ab128866a045cb6ef57108cba57b6d724ba9edbd52
pdf-font-stream PDF embedded font (sfnt) at offset 0x770B 9908 bytes