Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a42a6f05150138a…

MALICIOUS

PDF

54.5 KB Created: 2020-10-07 21:20:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bfb50dc33f00a97a67a5c8a53d4ffa56 SHA-1: 32b6abff94bc2b3b293900af0c66fe74e04d3630 SHA-256: 5a42a6f05150138a2ab751c9d6e7cb1763bb2dc6173fbd8fda32af35740b5708
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, many pointing to external PDF files, suggesting a link farm or SEO manipulation tactic. One URL, https://ggtraff.ru/pify?keyword=fitbit+versa+vs+amazfit+bip+italiano, is identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of numerous links and the redirector URL point towards a malicious distribution or redirection scheme.

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://ggtraff.ru/pify?keyword=fitbit+versa+vs+amazfit+bip+italiano In PDF document text
    • http://nusegipu.blessingsjane.com/uploads/1/3/2/7/132712661/todewisesofavufakaf.pdfIn PDF document text
    • http://xipavudig.womens-health-conference.com/uploads/1/3/1/4/131453574/bibalotipaw.pdfIn PDF document text
    • http://files.gbbcnc.org/uploads/1/3/1/8/131856247/bominirepivade.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9788/2773/files/dubekiwigogagasum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4118/6215/files/tujafizetuzetewuzoxakivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8201/3590/files/final_fantasy_9_mod_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1052/5853/files/susosodazotenosesosixiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/19199643085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5314/6527/files/newujoregosurutip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3103/5543/files/aeneid_aeneas_shield.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3942/0316/files/dulivunevelixadexagigoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7506/7297/files/topesojevanaxas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43c68807-f7ed-45f4-8105-dd735f360bdc/mubewojilirilegerot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b44d4ed-fb33-47e5-a929-924c2829c938/5628352368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/011b93e9-134e-474a-8955-aea01bb36273/96049820635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecef7371-3397-4543-92cb-ebb0904bf38b/nopupikawizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ac28fc6-0fd6-4dc1-80bb-062c32c59951/pariwimexokopisefeti.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF6 6424 bytes
SHA-256: 120dfd7c7977cfb9a90e0c19aa24ce80f3ad63f69756627d616fe21accc03e95
font_01_sfnt_off00007ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD8 5252 bytes
SHA-256: 940626e57a3fb1af8cff49bb59295282e33ad64859f54f4dff397d39e4e2f30e
font_02_sfnt_off00008cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CAD 13160 bytes
SHA-256: e5f7060c2f74b6f978a7a8b0542fb0ecdafd62d7a42115c16b48671c122a379e
font_03_sfnt_off0000b6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6ED 16148 bytes
SHA-256: dbe1f6873dfbc63a557840fa26764ed1e24daf10180a919a5f50e881975b6f06

Open this report in the interactive analyzer, or submit your own file for analysis.