Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60bb728a27da2de…

MALICIOUS

PDF

54.2 KB Created: 2020-09-10 19:40:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 981ff0333799539e01aca6a1039d4249 SHA-1: 5617f30475f96848e1ff6694ae97e5744c63af05 SHA-256: a60bb728a27da2def747003c5d6a79700c0866825d8dda9bd156d96411cf51ba
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.club/wix?keyword=kilauea+eruption+news+report In PDF document text
    • http://files.pur-pro.com/uploads/1/3/0/7/130775350/teninir.pdfIn PDF document text
    • http://files.villagevoiceschoir.net/uploads/1/3/0/7/130775126/denisor.pdfIn PDF document text
    • http://files.cindybabyn.com/uploads/1/3/1/4/131483025/860a0949.pdfIn PDF document text
    • http://botevefev.cosmicsistershop.com/uploads/1/3/2/7/132712237/4c47ecdde78.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/1/0433/9879/1322/files/lumosity_brain_training_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/9350982111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0755/7275/files/97975742656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8833338052.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6a7407_4fed780464ba46a48457b6475f885d91.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b6edda_266da936344c4cb794f1c5cfc7928804.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0010c8_d262006401244ef1b763897707edcaf5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bb13a2_9708dd62406544e2b6c7346409ba9016.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/078c79_af0f195275d6489db8dde7a259a49106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/keniv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4371/7274/files/bosch_maxx_4_wfc_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1530/6405/files/2170158039.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_off0000952e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x952E 4876 bytes
SHA-256: 932f44f14a9107a49eab3d697e78a7e5711a4cb07078c3819fdb27a176343478
font_01_sfnt_off0000a5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5E8 11048 bytes
SHA-256: d087321110869a1aabbeaf70d7d746fa73d3e3253d6baa66ac14ab3b412ea111

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