Malicious PDF — malware analysis report

Static analysis result for SHA-256 d39ddcc776616ee5…

MALICIOUS

PDF

62.2 KB Created: 2020-09-16 20:39:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03d6ec0be21e090532f4a509269bec29 SHA-1: be3833152ad76852b60475047cdba7e205189575 SHA-256: d39ddcc776616ee5efef959a073fbe68d7f6e2ea8355f2a1c20109a9f0633af5
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/wix?keyword=true+way+asl+answers+unit+4'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'https://cdn.shopify.com/s/files/1/0438/3493/3408/files/bullet_bike_sound_free.pdf'. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'True way asl answers unit 4'. 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.link/wix?keyword=true+way+asl+answers+unit+4
    • https://cdn.shopify.com/s/files/1/0438/3493/3408/files/bullet_bike_sound_free.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/function_in_ms_excel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3074/files/3140864093.pdf
    • https://033cadbc-1aa3-4a8e-b28c-f0bffc5fdb38.filesusr.com/ugd/03f576_5e564630ed5f4e6e94c434e8d8ee22d3.pdf?index=true
    • https://3e40ee50-765e-4b21-883a-263d431d5bf9.filesusr.com/ugd/682d1c_caa20960555d4af28b9f9040db2c13d0.pdf?index=true
    • https://da924585-7e48-407b-9ac3-534ec248e8ed.filesusr.com/ugd/03f576_484040d3455a4a44927c070d1547fbeb.pdf?index=true
    • https://cab5e330-bbd5-47be-88cf-a283a5aa7c82.filesusr.com/ugd/738632_15a6c8726c1f4a5aa4123cfdf29117e9.pdf?index=true
    • https://605db03f-8e99-4bb1-a84c-bdaec63a1dfe.filesusr.com/ugd/384ea4_ff096f2566144a639d3b7ba9aaaf6306.pdf?index=true
    • https://7ad74fe7-f34a-4a54-af99-d0f0b88b3b80.filesusr.com/ugd/33ab24_4fd00f56f397405fa2525c10dc9f1b4a.pdf?index=true
    • https://e3e4e6f8-af3a-405b-a100-ba3ad7c6aaaf.filesusr.com/ugd/31593d_625d398eae974c128b8cc63396d204ca.pdf?index=true
    • https://1d7c559c-74e9-42bb-a4de-b219648d91ee.filesusr.com/ugd/003b86_00879de4dd4f40059d6dc3e8abc3b771.pdf?index=true
    • https://6e74b444-fe16-4d56-9a98-7a604e79b01f.filesusr.com/ugd/defcb2_26674211966344d08d4502a34bf51c8a.pdf?index=true
    • https://53f0202a-f06e-474b-81cf-f7de37ca2c6c.filesusr.com/ugd/144d27_72a97e409bac45289e13084956e7aee5.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0436/0758/9027/files/godepuwogorexa.pdf
    • https://cdn.shopify.com/s/files/1/0465/3721/2063/files/skribbl_io_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/9108/2918/files/arris_tg862_manual_xfinity.pdf
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/gesaxux.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2225/files/zagexumarirokarifedol.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_off00009de8.bin
9644958e5ee45421c5c71a19527a6a547c364ad1e60611fa70f8321cf2e29e92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE8 4680 bytes
font_01_sfnt_off0000adf0.bin
ea555af2ffc3e13d60ac3ca04c9fb28fac4dcb573ee6999d43eb84d1316f4324		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADF0 15092 bytes
font_02_sfnt_off0000dd6c.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6C 4324 bytes

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