Malicious PDF — malware analysis report

Static analysis result for SHA-256 08753a9bedad1abd…

MALICIOUS

PDF

41.7 KB Created: 2020-10-07 16:50:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0a169c852bc0c02f56450937bb57f6f3 SHA-1: 63b33333e19f6d5eac622413f8b8bcead9444480 SHA-256: 08753a9bedad1abda6f5e11069ea8962afd51d47b4280b249f5ffe36f5051811
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body also contains a URL that leads to this redirector, suggesting an attempt to trick users into visiting malicious sites. The presence of a link farm and a redirector indicates a likely attempt to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.me/pify?keyword=remove+autofill+chrome In PDF document text
    • http://files.corpuschristicatholicacademytrust.org/uploads/1/3/1/3/131378968/nuririnaz_tenon_pafamumarowixug_lomasima.pdfIn PDF document text
    • http://files.borisbrew.com/uploads/1/3/1/8/131872137/kekolesixi-bexozoluzozini-nusunoxesawuvo-jaduzonalurofo.pdfIn PDF document text
    • http://lovoro.esausgunshop.com/uploads/1/3/1/8/131871980/jasuzut_xovoparidatub.pdfIn PDF document text
    • http://files.guitarsbygiltzow.com/uploads/1/3/1/3/131397981/vazar.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/1/0430/9857/0913/files/seal_team_season_3_episode_8_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/7486/4550/files/kugozedejurugodarox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/lozoxiwalarugimuxejozese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1895/1576/files/generador_de_citas_apa_web.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2353/4744/files/mosomujowimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4808dac5-f069-4323-b42e-2e9fce20d6f3/subunom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/225dbae7-7f30-40a8-a1d3-6f0c3651645e/navidovudisuzimezusujer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36ea9e0f-0562-47bf-b0ed-9edd7de09f3f/3826940829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec1cbd03-35be-4f41-850a-f5be8713a60a/xigupelibufewupibet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/1194/7926/files/tabc_study_guide_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8425/9231/files/18576080108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1113/5894/files/shelby_county_tennessee_register_of_deeds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1706/2558/files/botufosorupikikugag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8704/3496/files/pats_chiefs_live_stream.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_off00006722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6722 5012 bytes
SHA-256: 4462516262cf2ffae2add1b4420e82eba0df3917f51b7e99df674ac321441a0b
font_01_sfnt_off0000780f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x780F 9980 bytes
SHA-256: 43aa56afed663fef8ac80d7a535cb2cb76caf89ba12dd273f8a187efb47a10e4

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