Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b18f6dbb87be77d…

MALICIOUS

PDF

42.7 KB Created: 2020-08-07 22:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 03f8f4e2278c7dc728ba79697b089a98 SHA-1: def1a5a9f6594776d2223fa157a58c3e30289724 SHA-256: 1b18f6dbb87be77df10b3e84d539baa297b59e170ca4f39b4188017a6bc19482
202 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, which is a common lure for phishing or malware delivery. The document body and embedded links suggest an attempt to trick users into downloading further content. The primary malicious IOC is the ttraff.com redirector URL, which is designed to obscure the final destination.

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.com/pify?keyword=webassign+calculus+1+answers+pdf In PDF document text
    • http://files.creatify.media/uploads/1/3/1/4/131406684/nikaj.pdfIn PDF document text
    • http://files.caringnannies.com/uploads/1/3/1/4/131408432/pujosi.pdfIn PDF document text
    • http://files.davidzellnik.net/uploads/1/3/0/7/130740200/1428684.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/1/0440/0247/6190/files/20764691300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6249/1286/files/7151864772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2140/1237/files/kuzakosorefod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/toomanyitems_mod_1._12._2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/46349795291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/hash_table_in_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1050/6404/files/57471241800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9350/5688/files/wogenariwiwalavovisezef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9515/4070/files/65622076845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4062/8136/files/26571104787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/34920681197.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 6

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_off00006821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6821 5620 bytes
SHA-256: b24a613abab21f54e8485cc5f0b8a43fa3d0f12ec62f76b68f5c0cddbc9997ef
font_01_sfnt_off00007b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B70 10232 bytes
SHA-256: 1a294bc66f0f4522effebfc23d4729ae9c506daad67df55162203a5428cdf6ee

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