Malicious PDF — malware analysis report

Static analysis result for SHA-256 31aa31a31da5f311…

MALICIOUS

PDF

58.9 KB Created: 2020-11-30 17:59:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bc941801f76e41ebf01c51d8f58d17b6 SHA-1: 1dcc6dda06eede417a63bfef2a03c2afd91d5dff SHA-256: 31aa31a31da5f311901256d3d7ba081731cec0022ae53157adc9133b2279f9be
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links, many of which point to redirectors designed to obscure the final destination. One prominent link, 'https://gettraff.ru/123?utm_term=ps4+cords+for+sale', is flagged as malicious. The document body, though heavily obfuscated, appears to contain text related to sales, suggesting a phishing or scam lure. The presence of multiple PDF links and a malicious redirector indicates a coordinated effort to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?utm_term=ps4+cords+for+sale In PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/93049f265a0000.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9307a2a9-25d7-4194-a7bf-4fdc869fc4f0/8493097651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40887e88-d951-44ae-a106-89ca16fc0813/nibuzek.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbceed173299f0c543886d1/1606217427463/32512242619.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2e9962bbd74065813b99d/t/5fc3976f3570fb44d171a41b/1606653808034/mifasixituradosalobop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2f60560-40ba-4279-a833-d194cc36b575/bmw_3_series_e46_service_manual_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1ae84085bf90c0e029602/t/5fc487026457125654ccaa6c/1606715139792/78004869348.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/virus_and_bacteria_worksheet_answer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f169085bf90c0efd4cbb/t/5fc22219e18c5c478e43fb38/1606558233207/burlap_table_runner_hobby_lobby.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/john_henry_lyrics_bruce_springsteen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2ffcf44-b75f-4c15-91da-05750451ca1c/34065371886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9b746f6-f329-40b5-82ff-0169905c94af/najur.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF5E 5104 bytes
SHA-256: 5a1ee9391a288fb9786c1f7a8f15df11abdf4ce586d92cad8cd5229075d86ab2
font_01_sfnt_off0000c0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D1 8932 bytes
SHA-256: 4c5a94197d10d0dcd252be9c438afa1ae8a8cceb20a83f65066c469f164c8a55

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