Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1cce4b8aec58658…

MALICIOUS

PDF

59.0 KB Created: 2020-11-01 04:04:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: dbbee52af260f908f4a0f79fa0b7ff13 SHA-1: 845164aa78514390f522efb1beef5981c58f130b SHA-256: d1cce4b8aec58658213dcf1289e781bfc4db2e3b30cd2dde16a600ca07881ce5
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.me/123?keyword=bates+physical+assessment In PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/pupori-tuditab-dexanifi.pdfIn PDF document text
    • https://zebazowis.weebly.com/uploads/1/3/4/3/134310266/vuwazafegupa_wesatojeluki_bosop.pdfIn PDF document text
    • https://rimuzomidaz.weebly.com/uploads/1/3/4/3/134353295/9233802.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/bugojozozu.pdfIn PDF document text
    • https://ralerafuzirepob.weebly.com/uploads/1/3/4/3/134386916/lusumusave.pdfIn PDF document text
    • https://kitujimozudek.weebly.com/uploads/1/3/4/3/134375735/d27b9d4b.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/bedole.pdfIn PDF document text
    • https://xukanimuwuvam.weebly.com/uploads/1/3/2/6/132696198/78837abf1e77576.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000a70f.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000a70f.bin)
    • https://s3.amazonaws.com/subud/80292813920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/3598/0453/files/spotify_premium_apk_android_2.3.5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/4227/1917/files/1403978982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2843/3054/files/lock_screen_when_watching_youtube_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7578/9488/files/83167050479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0167/4435/files/the_leaf_cafe_bannockburn_il.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2315/4847/files/89640167234.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 extracted file (font_00_sfnt_off0000a70f.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA70F 5228 bytes
SHA-256: ee973774ddb29ba945919d1bf0ab263c1c25d5d3730ee4f123cf046cc8b9fe1c
font_01_sfnt_off0000b8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C2 11428 bytes
SHA-256: 47b2aef8da0b51e55b793de188fb17dbaf55ca7f5c204d54320133d1975b7c71

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