Malicious PDF — malware analysis report

Static analysis result for SHA-256 805c8e33e3b692cf…

MALICIOUS

PDF

57.7 KB Created: 2020-07-21 18:39:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: b19ed405fe9dc975a8fc5a63d2e95220 SHA-1: 9c7973cddbf8242ca788adcabda160462a72ae54 SHA-256: 805c8e33e3b692cf6a1bcbe6d0fe8a00ae0104a7334afbff42b18fb8b50e4f83
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'Raisin in the sun pdf book', suggesting a lure for users seeking content. The embedded URLs and the ML classifier strongly indicate malicious intent, likely to redirect users to further malicious sites or downloads.

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.ru/wb?keyword=raisin%20in%20the%20sun%20pdf%20book In PDF document text
    • http://files.montagmorgen-workshop.com/uploads/1/3/1/8/131872032/6748259.pdfIn PDF document text
    • http://files.faisslibrary.com/uploads/1/3/2/3/132302970/nagevinemenogozon.pdfIn PDF document text
    • http://files.c2cnys.org/uploads/1/3/0/9/130969503/a066a.pdfIn PDF document text
    • http://files.gammaetaomegaaka.org/uploads/1/3/1/6/131636990/5608641.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/1/0431/6954/6395/files/10752743061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2744/8476/files/vexatuzajegepinudelel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/pivuguporutisozajowetakub.pdfIn PDF document text
    • https://vakaximez.files.wordpress.com/2020/06/8756863634.pdfIn PDF document text
    • https://ratumiratox.files.wordpress.com/2020/07/75308720961.pdfIn PDF document text
    • https://jovemubam.files.wordpress.com/2020/07/sebomawodamafuguwum.pdfIn PDF document text
    • https://tasebetov.files.wordpress.com/2020/07/fipabolipo.pdfIn PDF document text
    • https://pizitotilu.files.wordpress.com/2020/07/tumifub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/bawepudobunekibemanavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/worafuwiwokazililisetin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9442/4232/files/leraredasoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5149/1236/files/96525853611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/xewin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4639/6326/files/63630531190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1013/0073/files/dulokanizobakubesipizobu.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

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_off0000a47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA47F 5092 bytes
SHA-256: 27aaa6af9f4da2b576111533e50e96ef9a6fb72f5dfb1b62fc00bea5a5c272e8
font_01_sfnt_off0000b5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C1 10304 bytes
SHA-256: c669035b566fc7ab3c96875f5e49b504212cfa9101f667f8786eca0e81f1fb36

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