Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef0f05f5f9a8ae8…

MALICIOUS

PDF

45.2 KB Created: 2020-07-29 07:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c5205a682b100859b480bdc86d834682 SHA-1: 2483e9354a23f438b92d198fa7bae8f1938e4347 SHA-256: 1ef0f05f5f9a8ae8cd35846bded5826564e5f7b0ba44466883a9f92b4a5c3f13
194 Risk Score

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.
  • 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://ttraff.com/pify?keyword=indesign+cc+2018+user+guide+pdf In PDF document text
    • http://files.boldwomen.co.uk/uploads/1/3/0/7/130739239/3c0c3a8ea6.pdfIn PDF document text
    • http://files.aprollers.com/uploads/1/3/0/7/130739986/runel_banipemas_rusajevir_mesor.pdfIn PDF document text
    • http://files.dishonouredmovie.co.uk/uploads/1/3/1/3/131384674/977536.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/1/0427/7121/8588/files/tizuxetumibukuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/19256405329.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2643/8550/files/fepadijusufawufaxalexax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3488/5792/files/vebenew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3141/2379/files/nidisapiruzupaxiwux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mavadusuwavofemikedoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7668/0869/files/68457198438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4229/2390/files/20376518962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4781/3269/files/wukazab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5598/6341/files/junipodomomaluri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9000/1572/files/sejatebowaxomotetijosajod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6801/5260/files/sujijuxuzel.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_off0000739d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x739D 5232 bytes
SHA-256: 7158c42579713a0e5cccac4ce808d0b0ba1be9c0dbf258cb75dbfb8fab2ba741
font_01_sfnt_off00008570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8570 9964 bytes
SHA-256: aad79c3326efb9a29c554bf8c15cb2fcf82d775c62944ac01a256adbd606752a

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