Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd936c881587499…

MALICIOUS

PDF

53.7 KB Created: 2020-08-25 13:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ccbabf1f25ec3a9f443f42ec518c0653 SHA-1: eef85e87f7b787a5142ea4df938df4a3893a56b8 SHA-256: 9fd936c88158749927d674b05e8639202c662b1e982f640fb368fdeed57c96ea
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=dragon+ball+fighterz+android+13'. Another critical heuristic identified a PDF link farm, suggesting the document's primary purpose is to distribute links to other PDFs, likely for SEO poisoning or to host further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=dragon+ball+fighterz+android+13 In PDF document text
    • http://files.ohenrymustangband.com/uploads/1/3/0/8/130815009/78d5f.pdfIn PDF document text
    • http://files.readingfamilyaid.org/uploads/1/3/1/4/131453493/c94a4cd5b04f.pdfIn PDF document text
    • http://files.afuricupertino.com/uploads/1/3/0/8/130873741/baxutale.pdfIn PDF document text
    • http://files.briancurtinbangkok.com/uploads/1/3/2/7/132710632/401a6d8ffcba.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/1/0427/7328/2983/files/88364559808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6163/1384/files/21563709424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0180/6997/files/fumemutimogezajapoge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugerivedisabuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/64421369084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/84778611875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0911/3253/files/janatha_hotel_telugu_movie_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84113106953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/acls_guidelines_for_ventricular_tachycardia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6952/2599/files/curcuma_articulos_cientificos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7663/2217/files/candlesticks_secrets.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
🗂 Part of campaign: briancurtinbangkok.com 3 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83CC 4664 bytes
SHA-256: 29d795be42b73c39d054560a1c37328de91040081a545af072e4e238c84c2ac2
font_01_sfnt_off00009420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9420 5396 bytes
SHA-256: 5c1692d2dfded19758b32efa063927cf132051636230b1eaf908f714263af2a6
font_02_sfnt_off0000a678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA678 10308 bytes
SHA-256: 1e08551b093f4cf9c1bc1723b130fee7f724bfdf0f3e06f4bbd948cf858893c7