Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6017c6c32962e9…

MALICIOUS

PDF

35.3 KB Created: 2020-10-06 16:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 538fb0decb3ecc17a35cfdd2bdcbe404 SHA-1: 8e9f9b4a674198352870860d5a5bd3f294c47b7f SHA-256: 7d6017c6c32962e9bf1ad727a681285580c6e4ccb0ff66b7eb329435d3987589
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The ML classifier strongly indicated maliciousness, and the document body, though obfuscated, contains URLs pointing to potentially malicious infrastructure. The primary attack pattern involves luring the user to click on these links, likely leading to further compromise.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=libro+contabilidad+de+sociedades+mercantiles+abraham+perdomo+moreno In PDF document text
    • https://site-1043908.mozfiles.com/files/1043908/davizeji.pdfIn PDF document text
    • https://site-1044157.mozfiles.com/files/1044157/2965412697.pdfIn PDF document text
    • https://site-1043314.mozfiles.com/files/1043314/zakorijosavoromeramarul.pdfIn PDF document text
    • https://site-1039556.mozfiles.com/files/1039556/nijeferovufomuwexeza.pdfIn PDF document text
    • https://site-1037121.mozfiles.com/files/1037121/27499642172.pdfIn PDF document text
    • https://site-1042196.mozfiles.com/files/1042196/96329319725.pdfIn PDF document text
    • https://site-1036911.mozfiles.com/files/1036911/badupaxedo.pdfIn PDF document text
    • http://lovejupu.adriansstorage.com/uploads/1/3/0/7/130775692/9fc12a2870.pdfIn PDF document text
    • http://nebazoge.apaveeperspective.com/uploads/1/3/0/7/130775677/xakulugukadek_bodotuzipur_werevesewuvu_kojuniratap.pdfIn PDF document text
    • http://putojipeg.texasgulfrecord.org/uploads/1/3/0/7/130775478/vuxoworazaziw.pdfIn PDF document text
    • http://files.marigoldyogaindia.com/uploads/1/3/2/6/132695759/zakimir_nokuwedexiladom_boxetiromomuxom_lezov.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/1/0483/8840/7448/files/53759946216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6600/7445/files/685_credit_score_mortgage_rate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3059/2160/files/pofogawikagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0887/1581/files/letter_of_intent_to_return_to_nursing_school.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A20 5396 bytes
SHA-256: f9c20e9d8c1621a53d513cac4ab8bde2e8aa327cdcc785e1001461ab1337eec2
font_01_sfnt_off00005c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C47 10436 bytes
SHA-256: 6eaa4a4eff66ae16daa4a608955ad17637ffbc6b5eb302c96cf067e4bb54f92b

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