Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c362bc49caf0f59…

MALICIOUS

PDF

39.6 KB Created: 2020-09-14 12:00:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0f8c8e2fbe08e84dbee38bf5a8ab443c SHA-1: 6d422d79fa468a7ee60cb2d57e7a32f71cdf8a16 SHA-256: 9c362bc49caf0f59ad1b84de3e899808418fe7f190affe12936126d64c139bde
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with a critical heuristic firing for a malicious redirector and another for a link farm. The document body, though heavily obfuscated, contains text that appears to be related to the malicious URLs. The primary intent seems to be directing users to potentially harmful websites, possibly for further exploitation or malicious content delivery.

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/pify?keyword=clicker+chamberlain+instructions In PDF document text
    • http://files.distilleddew.com/uploads/1/3/0/8/130814674/dibopudiviso.pdfIn PDF document text
    • http://zovolege.gumcpreschool.org/uploads/1/3/1/6/131637354/aba94a1347.pdfIn PDF document text
    • http://files.ggspdt.com/uploads/1/3/1/4/131437711/3384185.pdfIn PDF document text
    • http://files.bdonovanphoto.com/uploads/1/3/0/8/130874489/pulaninurezepu-jemilikisitim-dajexiwu-wusujeraze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3402/4855/files/pokemon_omega_ruby_rom_for_citra_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1995/9463/files/nawuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7356/8919/files/tixitopedubegagubofis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7088/1946/files/blaupunkt_bluetooth_speaker_user_manual.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cd81e9_9832ae99dfe843dbbd4554c785b41b57.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a8c229_31917210bff34a058dea899a0d5d582d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7603ae_e9a4b6b32b274227856692a95b3cc4b2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b80405_3d7fd5d7eacf4ab3ae14eeffaf239561.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0251f0_0d0decf2f13d4264b490a63ac878359f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d902bb_3ba98830c5ab4c988d7a61ecaee26af7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d2b720_e4ed65200f5f49bd8ddcdb9352066e48.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DB7 5148 bytes
SHA-256: c211864acb9d2b560d6a37659a1313fe86768cd17e78087e10544c393c1d57fa
font_01_sfnt_off00005f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F00 10612 bytes
SHA-256: 6a82ee869ed1d22d506a5935588ce12de2357eb61597091c271c67e075dc31db
font_02_sfnt_off00008342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8342 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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