Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f465b127b7a7ad0…

MALICIOUS

PDF

42.5 KB Created: 2020-07-17 05:08:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: c1a49ef29d435520bc6eb35c7cfe438c SHA-1: 3055a78eaf9996eee8adb8d822b1748069ab0ee7 SHA-256: 3f465b127b7a7ad070af02fd48790aa6c0e99c839f940fd1e8749b8cd85669ec
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used in a lure for 'Haynes aircraft manuals pdf'. The PDF also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious.

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.com/wb?keyword=haynes%20aircraft%20manuals%20pdf In PDF document text
    • http://files.merrifieldseminar.com/uploads/1/3/2/7/132710655/7749287.pdfIn PDF document text
    • http://files.frontporcharts.org/uploads/1/3/0/7/130739069/5237679.pdfIn PDF document text
    • http://files.callieraebowtique.com/uploads/1/3/1/8/131857758/fcade0e16cff3d.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/1/0431/1685/5453/files/31454075559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/mibovitedenet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/katowefesenibekuwezod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0326/4667/files/jezefixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdfIn PDF document text
    • https://gorajeg.files.wordpress.com/2020/06/kinitigadem.pdfIn PDF document text
    • https://semijex.files.wordpress.com/2020/07/34149953719.pdfIn PDF document text
    • https://xepuwedex.files.wordpress.com/2020/06/89032182522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/tufesaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2658/6520/files/82762549909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1308/7142/files/nokadijikedumagesiruzupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/zepusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5870/8118/files/biduloxexatewibujate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/tisugera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/moxapizuvivowu.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_off00005df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF3 5136 bytes
SHA-256: b78c65f69f88f528c5c5f3b8805d1c023bb21598b669666ee23a55eca30213b2
font_01_sfnt_off00006f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4F 13864 bytes
SHA-256: e37fbd72f79ad7533731f074b196c232ac32bd413a18373b0a385306fb00256e

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