Malicious PDF — malware analysis report

Static analysis result for SHA-256 2152006abe2ca11b…

MALICIOUS

PDF

44.0 KB Created: 2020-09-17 01:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2918e100603d29e5b5bfaba7fc4b3f15 SHA-1: 915979eb082268582c4a750965a983aefb138864 SHA-256: 2152006abe2ca11b57ce5dbeb870dfcc0a54ac98dddda7ff53e5468144e9e6e6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating redirection to known malicious infrastructure. The document body, though partially garbled, contains the URL 'https://ttraff.link/wix?keyword=dj+music+app', suggesting a lure for a 'Dj music app'. The presence of a large number of external PDF links further supports a link farm or redirection strategy. No scripts were extracted from this sample.

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.link/wix?keyword=dj+music+app
    • http://mupex.mcstorytellers.com/uploads/1/3/1/4/131405927/vomoderugasebegekaj.pdf
    • http://jegenule.nutrismartworld.com/uploads/1/3/1/6/131637352/barerenisupexokowa.pdf
    • http://files.montanahighcountrycannabis.com/uploads/1/3/1/4/131453194/5576132.pdf
    • http://vaxusuz.danielsswelltunes.com/uploads/1/3/1/4/131453145/cfc96f49a.pdf
    • https://cdn.shopify.com/s/files/1/0431/2770/1655/files/89875943142.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/wuxuf.pdf
    • https://a29b6c0b-8369-4261-a753-5d97337b1eb3.filesusr.com/ugd/c4dbd3_d2e06000de9c402bab0ccb6881032494.pdf?index=true
    • https://12ba05cc-e53d-45e8-82cf-6745ee7557b4.filesusr.com/ugd/681527_3454f9b27beb4a71af44d87cb7b20410.pdf?index=true
    • https://b7bca2ae-724c-4708-9e1e-2dba68ec1fc4.filesusr.com/ugd/e3ed1f_348ab0c1385f4ab38e88a5942937eb17.pdf?index=true
    • https://b233b234-88a4-4846-b02a-50e39df9c792.filesusr.com/ugd/a6e5e9_87b6a23c5f224aaabf990a6feccb8cdc.pdf?index=true
    • https://2376be1d-0d9d-4df7-86ad-345ed68ce46e.filesusr.com/ugd/f515ca_345caebac0d941b9bd3a2da2c14c7a68.pdf?index=true
    • https://8d585b06-742d-47e2-8b52-0573eb4b23a5.filesusr.com/ugd/4f270c_f537bd2309ba4cfd9f34cac1900c5196.pdf?index=true
    • https://a5270fdb-428c-4bc3-853e-8a9aa6b32cd7.filesusr.com/ugd/fc840b_81ea82b778ad424a9caabed5d04f759f.pdf?index=true
    • https://8b842de5-6093-4ac1-a27e-8a4e4c7470a8.filesusr.com/ugd/18122d_75d8512eefcf4d74ab401688f8847589.pdf?index=true
    • 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_off00006ec2.bin
952d598d96cff286aff8abec6eff33c0d73de41040a498ec93c7d80a28714a47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC2 5028 bytes
font_01_sfnt_off00007fda.bin
b4970023f96f6d41b8d084bbaf11e1002dfb7a318ebd3b51f939cf4f9e553313		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDA 10336 bytes

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