Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25c8b996b7412f3…

MALICIOUS

PDF

53.6 KB Created: 2020-07-25 21:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 66858477122ec5536757f923804dd035 SHA-1: fdb7cd5300947ee1f7a109348e16f385ea5358ff SHA-256: d25c8b996b7412f33c5c43f42400141d1fbd610876498d73ff3f1cd3dff35d24
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link farm with numerous links, many hosted on Shopify, designed to obscure the malicious redirector at ttraff.cc. The document body, though heavily obfuscated, suggests a lure related to "Clima colombiano pdf". The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a phishing or malware distribution site. No scripts were extracted, limiting the analysis of further stages.

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=clima%20colombiano%20pdf In PDF document text
    • http://files.marlonkellyloans.com/uploads/1/3/1/6/131606923/xalomupesulo.pdfIn PDF document text
    • http://files.thenarrowtruth.com/uploads/1/3/1/4/131452939/8870118.pdfIn PDF document text
    • http://files.mindbodycounselingllc.com/uploads/1/3/1/0/131070485/dufiludodeduji.pdfIn PDF document text
    • http://files.socorroboutique.com/uploads/1/3/1/0/131071167/6dbb85b0c583.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/1/0432/6372/1637/files/42324192519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3579/4344/files/jelidenugenejalavupogaber.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/sebofokipuzudibilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/61406949388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4044/0471/files/84721832557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4953/2057/files/84412846333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/doxikek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/visigevibimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/2402027752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2945/5271/files/91877708521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2606/9157/files/xubebiwewuriku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9832/4640/files/11130443867.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_off00009022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9022 4780 bytes
SHA-256: 3be4db89171074a25e6320122ec239da9e07e971dd11d160b357ee1106ca3962
font_01_sfnt_off0000a031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA031 13228 bytes
SHA-256: 5c389f3029adfbc33274028c4cd6c1e0b3b22318813c02d84f0ca9ffffc0befe

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