Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d80b6c1888edb5c…

MALICIOUS

PDF

141.8 KB Created: 2020-09-15 03:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 225cfdf883fe8a0c72c8cf824b19ce60 SHA-1: d0ce697dc3184fc98e2505eaa4e437c0b5b529af SHA-256: 2d80b6c1888edb5cfe840e6aaa772d9742e0e47d6a5c3cdbfc8986f6dd13eb9c
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search results for game cheats, directing users to a malicious redirector. The ML classifier strongly indicated maliciousness, and the PDF was flagged for linking to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/pify?keyword=dragon+mania+legends+cheats+no+survey+or+download In PDF document text
    • http://files.thechargestation.net/uploads/1/3/1/4/131406173/nijoweseri-popama.pdfIn PDF document text
    • http://sapipibo.hsexquisitecloset.com/uploads/1/3/1/6/131606289/botoluz.pdfIn PDF document text
    • http://muwirin.vtiie.com/uploads/1/3/1/4/131406352/vatosi.pdfIn PDF document text
    • http://files.thesinglesnetwork.org/uploads/1/3/1/3/131383750/vakigef.pdfIn PDF document text
    • http://files.thepioneercrafthouse.org/uploads/1/3/1/3/131383613/jeledawifazab-mewuwesarivaf-pogegajepepato-kekafawesifum.pdfIn PDF document text
    • http://files.coastalkayakcharters.com/uploads/1/3/1/3/131398221/xusugowut.pdfIn PDF document text
    • http://nasaso.radiancewithinrejuvenation.com/uploads/1/3/0/7/130775735/busikux.pdfIn PDF document text
    • http://sipej.chrisichaos.com/uploads/1/3/0/7/130776031/8778917.pdfIn PDF document text
    • http://files.cosmicreality.net/uploads/1/3/0/7/130775368/a50bcd902.pdfIn PDF document text
    • http://files.margotbittenbenderprints.com/uploads/1/3/1/0/131071137/5c17040d902f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/39a0fd_ef376609adb64c26aa1c994f2fd6b29e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_80ed5782f88e4ec5ba645ee0d45e12b7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c0b427_87eeef93dbfe4ba9a581306ce71ef120.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/dad90e_afc49d9b07a74665b25ee72253cab0c2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a31856_bc26ae25d8754b498f352fc8d66756f9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0118/3397/files/gold_lion_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9279/3757/files/14_apocryphal_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8548/7525/files/escape_room_game_level_142_answer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/48242473546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/74836304858.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ad33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD33 6744 bytes
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4
font_01_sfnt_off0001be18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE18 5608 bytes
SHA-256: 06837554b5448bd72c894fad14928ee9f7da4022ec7f75eeef4543a7ae53101b
font_02_sfnt_off0001d116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D116 2148 bytes
SHA-256: 97ecfbc835dcac37fe0a30a36917f6dd10efa9405d00e9a6401fd9019a6c79cb
font_03_sfnt_off0001db19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB19 16248 bytes
SHA-256: b4237cd2565ea80e9e4635c1532cc9fc2225554d425f79b7982fa8eab54acbc0
font_04_sfnt_off00020ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20CE8 17252 bytes
SHA-256: ea3932016c6b865727284c42b81f59f072483c5440c37bd9b4012294f06f552f