Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c444997dd90bd56…

MALICIOUS

PDF

38.3 KB Created: 2020-07-25 10:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9ef430e33cfd439bf8519804784642b0 SHA-1: 3c967d1cb9e404edbe2428e2e39153487f413026 SHA-256: 5c444997dd90bd56b37291c776b804204464bfbc0cf9a8d32bc2063430ed422e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains multiple heuristics indicating malicious redirector links and a link farm, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to 'math lesson answers', likely a lure. The primary IOC is the redirector URL which is known to lead to malicious infrastructure.

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=faceing+math+lesson+2+answers In PDF document text
    • http://files.movitzgroup.com/uploads/1/3/2/6/132696210/ecca383.pdfIn PDF document text
    • http://files.findhigherpurpose.com/uploads/1/3/1/0/131070394/1319685.pdfIn PDF document text
    • http://files.marriedmarks.com/uploads/1/3/2/8/132816158/wawezanuz-titun-resuta-ponupax.pdfIn PDF document text
    • http://files.pediatricdentalalumnisocal.org/uploads/1/3/1/3/131384468/xopumuvi.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/1/0440/1030/7749/files/95111259136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2650/4086/files/gamufaxelutabubozedege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78394199391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/vexudabufopowevugamivokik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0455/7472/files/joriken.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7152/0409/files/6665706891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/35026478955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1188/9573/files/gotirobenoxorokefupase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/37831266351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9743/8875/files/gixuwekusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/33784864889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0913/0143/files/82176259756.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_off00005896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5896 5180 bytes
SHA-256: 10034b79eecd549f50f9dee69e00dd3c07014bbd4e167c2abb6ab65e9c731c9c
font_01_sfnt_off00006a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A18 10048 bytes
SHA-256: 0069dad8c0a92086ff4c0b03e2be184b32001e5dcc2f2d4cae9db08e35e50379

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