Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bdfffcd8e3b2e2e…

MALICIOUS

PDF

45.8 KB Created: 2020-10-25 23:29:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: b91d5cece57463547e149062c870e812 SHA-1: 398938a72810a70015fc9553211010bcd896e4f8 SHA-256: 9bdfffcd8e3b2e2e2a4e4be8d24f548a382868097549bcd8784ad4d91d1930da
262 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?keyword=push+notification+android+php In PDF document text
    • https://zisokilusativ.weebly.com/uploads/1/3/2/3/132303079/7d211d88c1.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/8592453.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7360136.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/ripike.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/aa8853f1611e3a.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/7fde262bb4b.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/mamizikarisif_favavuk.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7885719.pdfIn PDF document text
    • https://rogidalot.weebly.com/uploads/1/3/1/6/131636841/2a353234029.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/lilili_visajagifetosiz.pdfIn PDF document text
    • https://zuwulixomelonib.weebly.com/uploads/1/3/4/3/134385653/1920488.pdfIn PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/9399046.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/e467f6cd0.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/3705836.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/1/0437/4334/6839/files/multiplication_chart_0-12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5354/5632/files/pet_practice_test_plus_2_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3458/1436/files/five_lean_principles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8317/9195/files/biology_class_12_practical_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3936/5546/files/pujamokanotipiwed.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/automates_programmables_industriels_2e_dition.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/80551447449.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/rumus_baxter_anak.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/jumelizozifewalisi.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/ap_biology_exam_study_guide.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_off000070b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70B7 5212 bytes
SHA-256: 7e8e931feb7fb0a1cd835550093bd9dc176bf5e02c89b4b9215904a0c932fb2f
font_01_sfnt_off00008262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8262 11588 bytes
SHA-256: de4b683af755492ce3660ade05d4d6dc95041317abeff0e4cffb04cd2a06c70e