Malicious PDF — malware analysis report

Static analysis result for SHA-256 c824bd36ca020d1a…

MALICIOUS

PDF

51.8 KB Created: 2020-08-20 07:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bb0c841e5301086874d52761815dc6a5 SHA-1: 00918f30cbe2c7fc014296642c3766823da90975 SHA-256: c824bd36ca020d1a790272da9dd5c28f2ae3acf50136ff85143a5e561f6050d5
202 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which point to Shopify. The presence of a visual download button lure suggests an attempt to trick the user into clicking the malicious link. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=adi+buddha+mandala+mantra+sheet In PDF document text
    • http://files.acpnutrition.com/uploads/1/3/1/6/131637325/moviridu_lasal.pdfIn PDF document text
    • http://zaluj.outdoor-motorsports.net/uploads/1/3/1/3/131383591/6891287.pdfIn PDF document text
    • http://files.gobigt.com/uploads/1/3/0/7/130775701/kemagalada.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/1/0428/2161/5783/files/tetopimuvatajazovupijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4235/4853/files/vajodemotijazotamewoxux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/nokeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/la_vie_en_rose_uke_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5015/5688/files/pisixij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/dajuvaditemalututelaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3492/7513/files/balanitis_manejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5482/4598/files/46777183929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6200/1825/files/dezubosezopiwipavamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/67463405503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7469/6856/files/fozeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/fewotuwe.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69B6 7504 bytes
SHA-256: 9fbe5f5cf2ae93657acc7ea6ec8d2845740219ecb603e56155d7c1ccd9327cb2
font_01_sfnt_off000082fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82FA 4968 bytes
SHA-256: bd247fbff524d17efed5d81721f913e579870846eff8a5752f8afd93ae71776e
font_02_sfnt_off000093a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93A1 9424 bytes
SHA-256: 2956dbb183b0ebc84fd245b69ab89418a23ff7b9689b9121c6fbacae13461503
font_03_sfnt_off0000b3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361