Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c0b1d43c1b4d5ad…

MALICIOUS

PDF

48.9 KB Created: 2020-09-17 14:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98c242b21e473ecaa96c8ddbe6d90dc5 SHA-1: 1445f33f028153b1f8df16d626306d5ced6fff3e SHA-256: 4c0b1d43c1b4d5ade173c99fee5d81dcfba10f475ba9b2df21234f1dac04a002
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=unlockmytv+apk+firestick', which is also flagged as malicious. This suggests the document's primary purpose is to redirect users to this malicious site, likely for phishing or malware distribution. The presence of many external PDF links, some pointing to benign content and others unknown, indicates a link farm strategy to improve SEO for the malicious redirector.

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.club/wix?keyword=unlockmytv+apk+firestick
    • http://files.japanesephilately.com/uploads/1/3/2/6/132695734/jenezutufo_lexiga_sabaxidado_manovus.pdf
    • http://files.lashnessco.com/uploads/1/3/0/9/130969761/9467331.pdf
    • http://files.hotepseminars.com/uploads/1/3/1/3/131398362/664b0649307cb28.pdf
    • http://files.wildrootsapothecaryandboutique.com/uploads/1/3/1/6/131637218/zimelupafij.pdf
    • http://files.mindfulprofits.com/uploads/1/3/1/4/131452804/rakapesokakute_zunuzufulusime_levogeb.pdf
    • https://cdn.shopify.com/s/files/1/0438/3847/2357/files/chicago_bears_schedule_2020_printable.pdf
    • https://cdn.shopify.com/s/files/1/0433/1995/1513/files/kigonuderakomamonezes.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1549/files/dictionnaire_maritime_anglais_franais.pdf
    • https://ab6f1ab1-b27c-4c30-849f-ee44e626a702.filesusr.com/ugd/ddb60a_26529997a24346f6b064248336b835b7.pdf?index=true
    • https://090a5d4d-39dc-49f8-8680-cd3caf54e8b4.filesusr.com/ugd/d1c05f_761e114b2bcc4098a7a8d587f3ff9e0b.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/2020_nfhs_lacrosse_rules.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/29727111900.pdf
    • https://cdn.shopify.com/s/files/1/0430/1167/0179/files/68054403839.pdf
    • https://cdn.shopify.com/s/files/1/0429/7333/1609/files/adding_and_subtracting_integers_lesson.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_off00007347.bin
e3985153debeba3573d29be681df7dc33e0a43247957ee2d2ddebe57e8ad36ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x7347 5164 bytes
font_01_sfnt_off000084c8.bin
087a9e6a5c6a1517dd76b9e51f963c23c0bf766542a7e4849805345d92f8b6be
pdf-font-stream PDF embedded font (sfnt) at offset 0x84C8 10364 bytes
font_02_sfnt_off0000a84d.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xA84D 4324 bytes