Malicious PDF — malware analysis report

Static analysis result for SHA-256 18923a0b3f6e19f1…

MALICIOUS

PDF

52.4 KB Created: 2020-08-02 21:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ef238fbe0c18db9032b1f191fe759215 SHA-1: 37bdfee3aa0e74221ff7266806e67b95c0c8b01d SHA-256: 18923a0b3f6e19f1282141afbe19c32c7f8135ef1b48d687e3f01f5648668561
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a redirector service at 'ttraff.com'. This service is flagged as malicious and is likely used to obscure the final destination of the attack, which appears to be a phishing or scam attempt disguised as a download. The ML classifier strongly indicates maliciousness, and the presence of a redirector URL is a common tactic for distributing malware or leading users to malicious sites.

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.com/pify?keyword=java+code+for+tic+tac+toe In PDF document text
    • http://files.elizabethwoodrum.com/uploads/1/3/1/4/131453522/folobajosejurasasa.pdfIn PDF document text
    • http://files.iremuny.com/uploads/1/3/2/8/132814589/8c9368e520.pdfIn PDF document text
    • http://files.entartetekunstliteraryreview.com/uploads/1/3/2/6/132683135/1535575.pdfIn PDF document text
    • http://files.tradstonework.com/uploads/1/3/1/3/131381288/723705.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/1/0433/0687/7080/files/kopamidije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6332/9446/files/20102596851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0144/4512/files/mipewuzoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4392/8726/files/84454177444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/titamixiwizubezakijogemuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2207/4534/files/lileliwutojokuvelezepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/zavolamolozepade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/babazewosaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/30396581121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4294/7750/files/17856995862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5393/0901/files/58702012411.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E8 4856 bytes
SHA-256: 662cb7aaa4b1ef2f8d4e381f7696963016ab96b58ccd3b9fd0dc58675f53d05d
font_01_sfnt_off0000777f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x777F 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000800c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x800C 14856 bytes
SHA-256: 8fa2aa640c08f1ddd7613c0cf274db22fedae4867951789f749503eef16997ad
font_03_sfnt_off0000aefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEFC 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1