Malicious PDF — malware analysis report

Static analysis result for SHA-256 868a752352ca8e23…

MALICIOUS

PDF

52.7 KB Created: 2020-07-23 02:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 2ba32a2e3ba564d901567ac8a6947468 SHA-1: 0d7e68e81f8404346ad051963a0eab412774a22b SHA-256: 868a752352ca8e23be720321520e73bcde4b9391297c53ee61069f1178e2a3fb
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links designed to appear as search engine optimized content, leading to a redirector URL. This indicates a phishing or scam attempt to trick users into downloading further malicious content, likely disguised as academic or technical documents. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=quantum%20mechanics%20handwritten%20notes%20pdf In PDF document text
    • http://files.sierranevadapork.com/uploads/1/3/0/7/130776327/pexilimubibexagasuta.pdfIn PDF document text
    • http://files.leoinyourkitchen.com/uploads/1/3/0/7/130739810/xipolotogi-ruwawuve-surejeme-kakisiz.pdfIn PDF document text
    • http://files.stevecrowhurst.com/uploads/1/3/1/4/131454090/6531768.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/1/0429/4826/4089/files/tasemasawiranalomebaxube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5653/7505/files/87625275833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/pepitutineratejenexat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8355/4206/files/15512255896.pdfIn PDF document text
    • https://bewonaten.files.wordpress.com/2020/07/83734824975.pdfIn PDF document text
    • https://ragetefuka.files.wordpress.com/2020/07/12077378337.pdfIn PDF document text
    • https://sexedituf.files.wordpress.com/2020/07/jodokulukasatunoleleleje.pdfIn PDF document text
    • https://dekelemogi.files.wordpress.com/2020/06/funitugarimon.pdfIn PDF document text
    • https://manisesemumi.files.wordpress.com/2020/07/52619458720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9586/6010/files/jivolevirowegarazoxej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4245/5197/files/42403660270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2278/6466/files/31863273964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4035/9068/files/zefal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1024/5279/files/21029153727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7742/7609/files/napopotitegakamekufebab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/18286700978.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_off000082ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82EC 5396 bytes
SHA-256: b3365b5f4f681bbc6395c6e96b6f4373db33b8b706335568e991d4ad744324fa
font_01_sfnt_off00009520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9520 15504 bytes
SHA-256: a47e8f676be2b814a429f4d18b68ee788cee2d2bab53755ed2ee59c643683543

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