Malicious PDF — malware analysis report

Static analysis result for SHA-256 78ad720685c4e476…

MALICIOUS

PDF

81.4 KB Created: 2020-08-29 20:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34dbc92a6b8eb44b1d8ebb377a911e1e SHA-1: 5688ebdee089ab69ec4f59ae30b256ccbd374891 SHA-256: 78ad720685c4e476007b8ac91ac1223c24ed1bb0313fb4cb165a95f3260b740b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL supports this. The document body, though heavily garbled, contains a URL that matches the malicious redirector.

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.ru/wix?keyword=super+agente+cobra+en+espa%25C3%25B1ol+capitu
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_a869ed50d9514b0c9edd6909e39da331.pdf
    • https://static.usrfiles.com/ugd/0adedf_0529ebcd48a140c5b22595e75e7b62fe.pdf
    • https://static.usrfiles.com/ugd/4d400c_aebad64957434d9c9fa3e1a3b2a275da.pdf
    • https://static.usrfiles.com/ugd/b8c837_ecf87b87e9d6415997fea48b7193cf8d.pdf
    • https://static.usrfiles.com/ugd/b8c837_2980f03b62a040bf9d78b0240be816ca.pdf
    • https://static.usrfiles.com/ugd/e8506d_705edf3188714a15bc9daf6ee23c6afd.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1c18537395544b990b7f884db664f53.pdf
    • https://static.usrfiles.com/ugd/8b97dd_3c82e71b7ebc44da8b21d91bb1578def.pdf
    • https://static.usrfiles.com/ugd/b8c837_e1e15348104e4cf1a43f89dd17fac07f.pdf
    • https://static.usrfiles.com/ugd/c068f8_caedc8cf02b846ee887d812b08b45493.pdf
    • https://cdn.shopify.com/s/files/1/0437/6592/3992/files/41228764814.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5609/files/kayla_itsines_help_guides.pdf
    • https://cdn.shopify.com/s/files/1/0455/4617/6677/files/rudram_namakam_chamakam_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/7763/1126/files/wipewux.pdf
    • https://cdn.shopify.com/s/files/1/0431/5280/1954/files/rasusamujabezowotepuxan.pdf
    • https://static.usrfiles.com/ugd/b8c837_f94ba408e5774401aeaaa9c15923d862.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c37399c1eb548f2be6e36137f614763.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9409c01551b4dadba2efda7128ec2df.pdf
    • https://static.usrfiles.com/ugd/b8c837_cee4f5f484134a58a92356ca0dc9fcee.pdf
    • https://static.usrfiles.com/ugd/b8c837_e05f61f635564c39ac56fe817fd34e91.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da22.bin
d25055e6acd6853c494c6a10e7493666a2b0fa79b18e59bb32b7fe8128e11e8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA22 5820 bytes
font_01_sfnt_off0000ee1b.bin
439b5f539b1068498454c0cd708c7bb62f097ce6fe9c9a0d15412fb3f732fb13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1B 5440 bytes
font_02_sfnt_off00010058.bin
06d728c8136632e5bcb1be33aafac2f48df5f78261919895bd116d7e68828a1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10058 12024 bytes
font_03_sfnt_off00012749.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12749 4324 bytes

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