Malicious PDF — malware analysis report

Static analysis result for SHA-256 881cc5091d128c92…

MALICIOUS

PDF

47.8 KB Created: 2020-08-07 21:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f07d33a2ca9a14ba5c3e679215eacbd1 SHA-1: a7f9b2f8b7f77da9018091aad468242af189ecaa SHA-256: 881cc5091d128c92c0538462f0444fc3afd6e2eb04660dd7a43d6c036e3b8bc8
194 Risk Score

Malware Insights

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

The PDF contains multiple links pointing to a redirector service (ttraff.cc) which is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'ccie sp workbook pdf' and a URL that appears to be an SEO lure. This suggests an attempt to trick users into downloading potentially malicious content by impersonating a valuable resource. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=ccie+sp+workbook+pdf In PDF document text
    • http://files.hebshf.com/uploads/1/3/1/8/131871462/7644777.pdfIn PDF document text
    • http://files.barkerstrathcatholic.com/uploads/1/3/0/7/130739974/ziladibevob.pdfIn PDF document text
    • http://files.lavenderbluevintagedesigns.com/uploads/1/3/0/7/130775737/7719268.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/1/0433/4632/9750/files/pikujeranavadirod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/58806120430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8085/1364/files/39580179803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/inquisitor_40k.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2933/0077/files/words_their_way_spelling_inventory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5802/0004/files/noxazur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/68147536738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2700/4577/files/31332171155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/54160521295.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2819/3186/files/dojojojabodedumatis.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_off000077f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F2 5108 bytes
SHA-256: 9d7833d4b81521344fcbfb1cb8534d542b85f5ee5046601ec7848795cdd740f2
font_01_sfnt_off00008975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8975 12712 bytes
SHA-256: 76f0987b0e2e19a95bfe585ae7ac243d49bbcb50a9f6b7239c5b18f767feed42

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