Malicious PDF — malware analysis report

Static analysis result for SHA-256 186d0c873918fd7c…

MALICIOUS

PDF

52.6 KB Created: 2020-08-31 02:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 01ae6295c7f797e11b0af020eddcffc5 SHA-1: 2fd527801d3a50cc39e724c822d4e1af428946f2 SHA-256: 186d0c873918fd7cc73134dc552dfbb8d723d5a4a51359c11a03da3c2b948de6
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.link). The document body, though heavily obfuscated, contains text related to geometric shapes and the malicious URL, suggesting a lure for phishing or a scam. The ML classifier strongly indicated maliciousness, and the presence of a link farm reinforces the malicious intent.

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.link/wix?keyword=alturas+de+un+triangulo+equilatero In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/a298ce_ea1445e6cfcf4ffeb51c2d208fde2534.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3ba1575a95e042ae8e625d3dd533067c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_84925f555f054e87bcf7bacf60537fb1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/912de2_807f48bcd3f34d329105a010aa5eb14f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_675826b6c0e14a5c887689b8dad0a5f5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/98e298_235f06f8ecf746d8aa0344bc6e5f85fc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/wovugijev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/tetorik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0051/8040/files/xobotonalimilupebebedozop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8038/3653/files/jexarapag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/79414436690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1500/4582/files/site_reliability_engineering_o_reilly.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0706/4734/files/jquery_ajax_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1042/4985/files/jironivuzamepewidijelok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7841/0655/files/kesukusugapelenekewiboj.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off000067e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E8 6440 bytes
SHA-256: edf517a561ed5132c6c1d5718ac6ff9d870a00e6f43a91762fd168a2279cca75
font_01_sfnt_off000077de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DE 5108 bytes
SHA-256: 9f1a2e1dd3449a5d7328d6bcd5099d333cd4750e28cd2e329afa14d8438a6514
font_02_sfnt_off00008935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8935 11364 bytes
SHA-256: af00ced304df664b5ebfffd990c7f9700ad8741badfee8a5bd3b22387c217bf3
font_03_sfnt_off0000ae6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE6A 16088 bytes
SHA-256: 3c1c7bd747a9a8f6e1c531457064e9378d9a893e5271ac7381d9d0015290d8f4