Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c70fce5182157a…

MALICIOUS

PDF

61.4 KB Created: 2020-08-18 19:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fbc2535e01a43c88d50d3c179965b3ab SHA-1: 581fccd354e6b502bbde5d372f4a1d9c248d9d45 SHA-256: 16c70fce5182157a31b3a9eed7c81706ffe7f3d6d8cfe183922ed25f03ad7799
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body itself contains text related to 'Maplestory training guide' and includes the malicious URL, suggesting a lure for users interested in such content. The presence of multiple PDF links and a redirector link strongly indicates an attempt to lead users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.com/pify?keyword=maplestory+training+guide+200%252B In PDF document text
    • http://gawopesif.nicoleedwardsauthor.com/uploads/1/3/1/4/131453215/67ca4cfe74c5.pdfIn PDF document text
    • http://tunam.mrmagicdetail.com/uploads/1/3/1/4/131437254/rufuz.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/1/0446/6461/9171/files/runescape_magic_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8783/6837/files/sipemutir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/kigaxupopivujikijilax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/firewood_shed_plans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3909/6986/files/67119965478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/factorio_2_to_4_balancer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51025654711.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD7 5388 bytes
SHA-256: de3d1413a8db98d95ae2e465d82e3847b6933adcb36f00719a5af22a8191c64f
font_01_sfnt_off00009240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9240 16088 bytes
SHA-256: ebd2e8c7dd9381432c5a848e2475812527e6da79fddbb79c9219307e06604308
font_02_sfnt_off0000c3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E4 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e
font_03_sfnt_off0000d8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AC 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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