Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9515ccc2839496a…

MALICIOUS

PDF

46.2 KB Created: 2020-07-16 16:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: a684a1d4149dc1005c9ebfa56e5ff9ea SHA-1: 9c75cb10ed44575fc4ebb5609c6065c3917385aa SHA-256: e9515ccc2839496a5d9c20961d7149adbc3277af473ec7a8ee7a53af211820a3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links directs to a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to 'baby girl nicknames in telugu pdf'. No scripts were extracted from this sample.

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=baby%20girl%20nicknames%20in%20telugu%20pdf In PDF document text
    • http://files.pastyandpie.com/uploads/1/3/1/4/131483440/dunevabamumafanamato.pdfIn PDF document text
    • http://files.ldceny.net/uploads/1/3/1/4/131407284/8363423.pdfIn PDF document text
    • http://files.tadeaspriklopil.net/uploads/1/3/1/3/131379034/3589358.pdfIn PDF document text
    • http://files.legacyoptic.com/uploads/1/3/2/3/132302764/nalujuwexize_lowel_biposusebufimu.pdfIn PDF document text
    • http://files.etiquetteeveryday.net/uploads/1/3/1/0/131070202/9743441.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://koxopovobepe.files.wordpress.com/2020/07/82416785967.pdfIn PDF document text
    • https://baleboloj.files.wordpress.com/2020/07/fafukezabafozibodamaje.pdfIn PDF document text
    • https://zuxaxite.files.wordpress.com/2020/06/fegirejuzipe.pdfIn PDF document text
    • https://fevonag.files.wordpress.com/2020/07/nujetikenogobu.pdfIn PDF document text
    • https://jorerego.files.wordpress.com/2020/07/beligezaxizilerafuk.pdfIn PDF document text
    • https://leniwibi.files.wordpress.com/2020/07/62687455651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/genunugegufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0210/1923/files/kunawoniju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1924/7514/files/19773862327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/23881568539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3201/0152/files/gunujapuxitevibupume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1531/5351/files/papenudomemugozasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vabagibad.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 4

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_off000075d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D7 5600 bytes
SHA-256: 1ee24f53b6f4690b3716ebaa936f8540f3f3e71eca2927b3e9c857ab69448ae3
font_01_sfnt_off000088c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C6 10324 bytes
SHA-256: a480533cd63d3ab7341f16d9ed24b8e3060cbd2560c9993c3e651c18773cb37d

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