Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb8b8fd61e6bce3…

MALICIOUS

PDF

72.4 KB Created: 2020-08-12 13:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 980f6fe619606365e7f8aad4b0efdb58 SHA-1: 99ee91c81a08058edd16a3baaae2e1a6f4eb24e9 SHA-256: bbb8b8fd61e6bce312227705a8f2e33ed34202a1837973cbb4f8a4a4dc66bf36
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.cc/pify?keyword=developing+critical+and+creative+thinking+skills+pdf'. This suggests the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links also indicates a potential link farm or SEO manipulation tactic. No scripts were extracted, but the malicious redirector is a high-confidence indicator of malicious intent.

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.cc/pify?keyword=developing+critical+and+creative+thinking+skills+pdf
    • http://files.readingsync.com/uploads/1/3/0/9/130969494/dekun-tezeri-bunegedur-jukugagibudojib.pdf
    • http://files.rbsknowledge.com/uploads/1/3/1/0/131070161/8311077.pdf
    • http://files.rosarionolan.com/uploads/1/3/0/7/130776521/kekek_xonotaxofafiga_polaxof.pdf
    • http://mozavu.neblawyer.com/uploads/1/3/1/4/131438641/5405899.pdf
    • http://tezaf.spelledlikethehockeyplayer.com/uploads/1/3/0/7/130775971/cc8732443.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/dolemupitamowupesevixinas.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/rajakavek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9959313526.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/vojepemofeberafetitalot.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6918/files/bible_stories_about_faith.pdf
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/zenopesirusawaxonufoged.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunumegosuvuvorewufo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3382/files/jexisiromela.pdf
    • https://cdn.shopify.com/s/files/1/0431/7295/4269/files/vafawovavijepukavixij.pdf
    • https://cdn.shopify.com/s/files/1/0431/7691/9200/files/basic_vehicle_maintenance_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/lalawexilovidadugonoxana.pdf
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/kejuregifa.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_off0000d0d2.bin
019cf71c3093388f6e721468e7a8bb0b70e5f865245dac191c189d3b21e28723
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D2 5328 bytes
font_01_sfnt_off0000e2ec.bin
75c4ddf6feee84f8de7f34efc0a5ab5b7f7417e6c2ad2687ea52ab08840f70c8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EC 10076 bytes
font_02_sfnt_off00010570.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10570 4324 bytes