Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa57f8c7e5cfff2…

MALICIOUS

PDF

35.8 KB Created: 2020-08-18 23:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6909cc30b586821b7bc89f232fcc250e SHA-1: e068855c9f79b443ae35b9761e8ea182ca43af27 SHA-256: cfa57f8c7e5cfff282dc39e6ec7efe3308b1c434e4923cd448a51554b8a6218a
194 Risk Score

Malware Insights

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

The PDF document contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a coordinated effort to distribute malicious content. The presence of the URL 'https://ttraff.ru/pify?keyword=liberia+flag+photo' further supports the malicious intent, likely to lure users to a compromised site.

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/pify?keyword=liberia+flag+photo In PDF document text
    • http://files.eventsbyangel.com/uploads/1/3/1/4/131437457/wesinubaxiw.pdfIn PDF document text
    • http://files.chalicewurx.com/uploads/1/3/1/4/131452846/788796.pdfIn PDF document text
    • http://files.ozarkfamilyoperacompany.com/uploads/1/3/0/7/130775368/690eb2ed035fab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/70009475292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67295211500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/kubapew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6372/9557/files/76210133809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5325/9679/files/87027481467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1540/4702/files/g_eazy_random_mp3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/30553064556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/arap_bahar_nedenleri_ve_sonular.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4811/6119/files/vaned.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7454/1981/files/buyer_agency_agreement.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 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4393 4748 bytes
SHA-256: 73fd0d322a9f764a0f950198c414114b491764a2cddaa88d09c100863c8351a1
font_01_sfnt_off000053c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53C0 9636 bytes
SHA-256: 5e999099eaec6ecb661c9579c8a57d1fe69f857bbcd7cb52842eeea57c613edb
font_02_sfnt_off000074a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A3 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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