Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ff256f822f0b85a…

MALICIOUS

PDF

42.1 KB Created: 2020-08-23 03:02:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 43512620e2d67052bab41eb5730da403 SHA-1: fe6f8a5a18e60463db9b9dd9029c084ed51c846e SHA-256: 4ff256f822f0b85a8dc1d2e4f6fbdc6cd7c158e35539ca8d2edef21a403a5827
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious payload delivery mechanism. The document body is heavily obfuscated and appears to be a corrupted worksheet, further suggesting a deceptive lure.

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.ru/pify?keyword=heart+circulatory+system+worksheet In PDF document text
    • http://rezaxe.tintawitaelderliving.com/uploads/1/3/1/4/131406082/dipebinav_mugujejagar_lejisegubamijib_metusogupur.pdfIn PDF document text
    • http://pozanoko.joannajensen.com/uploads/1/3/0/7/130776031/2411129.pdfIn PDF document text
    • http://files.stclairwesterndressage.com/uploads/1/3/0/7/130776826/ce654360.pdfIn PDF document text
    • http://files.portogether.com/uploads/1/3/1/0/131070612/bapuravafu-gititagefu.pdfIn PDF document text
    • http://files.lama-lab.com/uploads/1/3/1/4/131483148/totegenuruziba-nijugufe-mokitedowofali-raxakaj.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/1/0433/6307/4213/files/neguduvezadedibubivugaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1253/5958/files/how_to_perform_amperage_draw_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5804/4826/files/45524522577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/19859163906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7385/8710/files/all_things_bright_and_beautiful_poem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2577/4245/files/46520408025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0957/1990/files/pupivitotunolape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/rewabavutoxej.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51EF 5260 bytes
SHA-256: 1246cb92991f49f6d2ec831f313408832ea65ef8dd05a758154b162e9f79d875
font_01_sfnt_off000063b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B9 9924 bytes
SHA-256: 2aebc223d1002fdb9a265590f88265e3be6f792fb2215481890ac332162a7552
font_02_sfnt_off000085e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E0 16088 bytes
SHA-256: b2ddecaff7e2361bf51021b35f9c014659943b600c4f466cb4656cea9e83b80e

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