Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f5ba9dea9150bf…

MALICIOUS

PDF

48.9 KB Created: 2020-08-13 21:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a8cf5b00063bd48af5ac16840976dfa1 SHA-1: 12046fbcf45348753525bf4d82a6fa0057c6ebe5 SHA-256: 83f5ba9dea9150bf69655824068ffbbc2062ddb34f78df44123c20dd24215d2d
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, contains the same lure text and URL found in the heuristics, suggesting an attempt to trick users into clicking through to a malicious site. The ML classifier also strongly indicated maliciousness.

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=top+5+cricket+games+for+android+2019 In PDF document text
    • http://files.alex-chien.com/uploads/1/3/1/0/131071062/tolirugapixejig.pdfIn PDF document text
    • http://files.catholicfaithandreason.org/uploads/1/3/0/7/130739814/nebezasuwojopuzuziza.pdfIn PDF document text
    • http://files.melissabowmanward9.ca/uploads/1/3/1/3/131398605/a7c6d2469.pdfIn PDF document text
    • http://files.oldhamcountypolice.com/uploads/1/3/2/6/132695200/videvifi.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/1/0429/1959/2103/files/2025717915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3218/0893/files/takobuxujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1007/1460/files/mowiranosubiredelaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9657/8979/files/christian_apologetics_norman_geisler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/kigenigasofoluwujiwotofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/60162013677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/fakizogegelexesira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5802/6903/files/8278798081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9127/1586/files/giderimilugor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7423/1199/files/lonuzajorikonovilux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0877/7637/files/arm_hammer_baking_soda_medicinal_uses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6706/4998/files/paxere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3663/8369/files/lojidikuvozosurinijovuji.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6842 6060 bytes
SHA-256: 244701a477f3b795d0c60008175c6bc1b0ddd2488ff8e5059c5178e0c334b4df
font_01_sfnt_off00007cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD7 10128 bytes
SHA-256: ebf22f3cd72c7a11260aefa05aa6b65bb5514e50e942fd14d4dd7cf02c5cac4e
font_02_sfnt_off00009fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FA2 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3