Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ddc0ade4a1072e…

MALICIOUS

PDF

40.7 KB Created: 2020-10-03 09:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 25ba06e1dd82c67a5abe2ad8623bab24 SHA-1: 78ec4e26385d0a5b8ccb30a61533bd77421bad84 SHA-256: b1ddc0ade4a1072eb4a84b8527a1c0947581f016cf5441c3185c4ed221ab2609
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link disguised as a washer manual, which redirects to a known malicious redirector. This suggests a phishing or scam attempt to lead users to malicious content. The ML classifier also strongly indicated maliciousness.

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://ttraff.link/pify?keyword=whirlpool+cabrio+washer+manual+pdf In PDF document text
    • https://site-1037218.mozfiles.com/files/1037218/61506399010.pdfIn PDF document text
    • https://site-1036987.mozfiles.com/files/1036987/gumipafabazot.pdfIn PDF document text
    • https://site-1040563.mozfiles.com/files/1040563/97438904756.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/a86db96f-cd85-4f2f-8bf2-eb5958d324ba/nozejujemubozirufavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49e211c1-810b-4780-b158-54966c57e1f1/kosubebopejafakikiwug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/032a39bd-054c-495b-919d-df665bb0f8c6/217793688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/430c09cc-a8f8-4492-a623-9c7ce2f7a5d1/kubegijobafaguxeboxulova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1e24447-4c89-4bbd-86bb-be7aa571441f/90381418201.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f2c966c-841c-4b9b-ae92-7e05d1e39424/39323000846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5267e630-048d-484e-b6de-f94bf06cbd50/45276363013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5269b3f0-d176-4cb9-a964-94485062727c/45970950183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/7284/1638/files/lotesafolobuzufubitez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2953/6668/files/99943534574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1848/5923/files/frozen_chicken_breast_air_fryer_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9873/7302/files/aranmanai_2_full_movie_download_online.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_off00005fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE8 5640 bytes
SHA-256: d00dca54a3b125ff48231ba9e442d808552b3f64e3b477fbdc97f697ba02e3af
font_01_sfnt_off000072f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F6 10276 bytes
SHA-256: aa02c8b4507e3340cd7f73c32b3b838292afbafd1421c170a968847fe2e22332

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