Malicious PDF — malware analysis report

Static analysis result for SHA-256 e35d1874155ca5b5…

MALICIOUS

PDF

55.7 KB Created: 2020-08-06 01:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 9080392706c305a2a5848814c50fd8c1 SHA-1: 2ff857f876979ebb6e099fbb4aaea8a77547aac1 SHA-256: e35d1874155ca5b5de79331679b5971a7edc6a89eb5385d81dc2476f40732487
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.cc/pify?keyword=linear+differential+operators+pdf In PDF document text
    • http://files.medwaybaptist.org/uploads/1/3/0/8/130874612/8935323.pdfIn PDF document text
    • http://files.jaehyungum.com/uploads/1/3/0/7/130776346/zopafi_legurugagupur_rokamem_fipuwivejodavaz.pdfIn PDF document text
    • http://files.maureenriley.org/uploads/1/3/1/6/131607054/bunudimiwa-zojiba-ruxuk.pdfIn PDF document text
    • http://files.dopepersonality.com/uploads/1/3/0/7/130738988/07a55.pdfIn PDF document text
    • http://files.therbtlshow.com/uploads/1/3/1/4/131437017/9a5266f.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/1/0433/0127/3750/files/55205107761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5639/7474/files/zafubipamav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2523/5111/files/ludulipaxevafake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8283/3308/files/6399458599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4393/7690/files/45440692851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/wimewojufafodozez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/bebuluboforesotarita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7362/6524/files/15349513980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/tujomonewisejapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7245/2776/files/zevubome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7848/3096/files/95440086759.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A36 4976 bytes
SHA-256: 101b05b7bc5c860b908f4e4ff4b7b8ac89c4ba6ef4a2bbcac637e2355e10c1ca
font_01_sfnt_off00008b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B35 14840 bytes
SHA-256: 7c8d94d68f0089adc94e4a16678666f842d9972d5a1067713aa9591894c0006a
font_02_sfnt_off0000ba9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9B 16572 bytes
SHA-256: c785351c1530f0fda6eb4e895ad1c9e84f52c9a83bb6d1b002e8d4ca9eab2b6a

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