Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e8f4439589f518…

MALICIOUS

PDF

75.9 KB Created: 2020-07-15 15:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: f17bea71ce293a75961b18e8a4bc177b SHA-1: cea7e4b4e848352fc9f2c74f59826e62c990eddc SHA-256: 68e8f4439589f5180b4ec89b73e2fe4b2735958c919892cf6e7446e8054a5370
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirectors and a link farm, indicating a malicious intent to direct users to potentially harmful websites. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded URLs and the nature of the heuristics suggest this file is part of a phishing or malware distribution campaign.

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=eras%20protocol%20colorectal%20pdf In PDF document text
    • http://files.annieontheemeraldcoast.com/uploads/1/3/2/3/132303075/rotojitusodi.pdfIn PDF document text
    • http://files.kidstopinc.com/uploads/1/3/2/6/132681303/foximudiwinig.pdfIn PDF document text
    • http://files.100percentcajun.com/uploads/1/3/1/4/131437045/1564b881f66c48.pdfIn PDF document text
    • http://files.ttphotovideo.com/uploads/1/3/0/7/130774990/1089514.pdfIn PDF document text
    • http://files.pris-t-gis.com/uploads/1/3/1/0/131070481/7825647.pdfIn PDF document text
    • http://files.bikelabinc.com/uploads/1/3/1/3/131379543/tefewoduj-baworeduginav-taxopotonovod.pdfIn PDF document text
    • http://files.caitlinromeoeventing.com/uploads/1/3/1/4/131437982/055eb7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://pavuzuro.files.wordpress.com/2020/07/kusopesiroxeb.pdfIn PDF document text
    • https://zorozoxagis.files.wordpress.com/2020/07/xatojumifisogunejigufokug.pdfIn PDF document text
    • https://nobijip.files.wordpress.com/2020/06/78978728208.pdfIn PDF document text
    • https://futidufesag.files.wordpress.com/2020/06/gubaripe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90262961418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57032902602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74832969368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/naxijitomugilipux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7333/1609/files/vaviwefozezak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/relutejakimilaxevefefitif.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_off0000e099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE099 4740 bytes
SHA-256: eac6047c2357ee9e22c06354918f87c20bf632bca744402585f17128319e97c6
font_01_sfnt_off0000f0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C1 15840 bytes
SHA-256: 1c8172663907cb10c9a21fa03007db8dd8444b0a1254504d43a6cb7935171b78

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