Malicious PDF — malware analysis report

Static analysis result for SHA-256 48b87b5ae78fae2f…

MALICIOUS

PDF

61.7 KB Created: 2020-10-06 21:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 75df41e53aef6177d5b57a3bf01040d5 SHA-1: f2b6051510bd9fa0059c8440237ee64df11b91f8 SHA-256: 48b87b5ae78fae2f436ab80ac9dcf337330b2b4714516e2f6f70cf5b2d7dba4b
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that lead to a malicious redirector, disguised as educational content. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies the primary malicious URL. The document body, though heavily obfuscated, contains the malicious URL and other benign-looking URLs, likely part of a link farm to improve search engine ranking for malicious content.

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://gettraff.ru/strik?keyword=ygs+anlat%25C4%25B1m+bozukluklar%25C4%25B1+%25C3%25A7%25C4%25B1km%25C4%25B1%25C5%259F+soru In PDF document text
    • http://files.tenstringedlyre.com/uploads/1/3/1/4/131406717/fcd62e2f03f1f76.pdfIn PDF document text
    • http://files.cowboygearbyhayroot.com/uploads/1/3/1/6/131607930/wumumekapomev.pdfIn PDF document text
    • https://site-1039301.mozfiles.com/files/1039301/53254704250.pdfIn PDF document text
    • https://site-1039667.mozfiles.com/files/1039667/92139135864.pdfIn PDF document text
    • https://site-1039533.mozfiles.com/files/1039533/93960292738.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/1/0428/7699/3702/files/62256560004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5661/0969/files/paladin_divine_sense.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4455/0294/files/clean_desk_policy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/angela_duckworth_the_power_of_passion_and_perseverance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2303/1720/files/notesudowajepik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0976/8604/files/batiporozadatom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3053/6614/files/nenozufuwivebuje.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9326 5684 bytes
SHA-256: e35bdb57413f9005ccc228303583388f29567bb72cf086b10a8c455fe1c59fd3
font_01_sfnt_off0000a5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5C6 15416 bytes
SHA-256: 3d4127039228db31c79464315ea2dab2417ba04ba20a6eedfcc91612ea550e0f
font_02_sfnt_off0000d2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C7 16060 bytes
SHA-256: d78d7cc1a68daa951b4fbccbcfb906d5a08ad384f187125596154666a45abe72

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