Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7246670fdf2b34b…

MALICIOUS

PDF

33.6 KB Created: 2020-08-11 12:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0539006fc83005dcadb5bdf6646dbea8 SHA-1: 52082696226b2e6a356dff39d8e8bf62baa04c59 SHA-256: e7246670fdf2b34b96c9d8456517bf97da2041de35b9a957c5529333d24e5192
150 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 external PDF files hosted on various domains, including a redirector at ttraff.com. The document body text and embedded URLs suggest a lure related to a calendar search, likely intended to drive traffic to malicious or SEO-spam content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wb?keyword=mahalaxmi%20calendar%20jan%202019%20pdf
    • http://kikimegek.raananahikers.com/uploads/1/3/1/4/131407493/loxavudosobud-zebok.pdf
    • http://jaxolo.germanbirddogs.com/uploads/1/3/1/3/131398101/tovuxirugag.pdf
    • http://files.thevigilgroup.org.uk/uploads/1/3/1/3/131383657/rimejaj.pdf
    • http://files.kiyashanti.com/uploads/1/3/0/8/130814758/5886456.pdf
    • http://files.incrediblydelicious.com/uploads/1/3/0/8/130813588/novusijilijiwefunife.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69892687871.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/pilumokujofofati.pdf
    • https://cdn.shopify.com/s/files/1/0433/6667/8686/files/dojixojukesuwu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/94287487073.pdf
    • https://cdn.shopify.com/s/files/1/0431/2327/7973/files/balkan_wars.pdf
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/labolanufu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8420/8545/files/comcast_xfinity_channel_lineup.pdf
    • https://cdn.shopify.com/s/files/1/0436/2888/8227/files/list_of_philippine_accounting_standards.pdf
    • https://cdn.shopify.com/s/files/1/0449/8318/9662/files/physical_appearance_adjectives_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/25382468146.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6394/files/engineering_anthropometry.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/64553528610.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_off000045b4.bin
21aa7a8997ec543249517490615ab1c325173e5692c020f9a8b881073e4a9ff6
pdf-font-stream PDF embedded font (sfnt) at offset 0x45B4 5848 bytes
font_01_sfnt_off00005985.bin
d3f6f3035d0f5702b170d953006dfa6a7969ef187a45c678b52525125d6d5160
pdf-font-stream PDF embedded font (sfnt) at offset 0x5985 9420 bytes