Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1a509f5595d6b2c…

MALICIOUS

PDF

49.3 KB Created: 2020-07-31 15:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d390ac1e8ef13125358592f7904c7e65 SHA-1: 12f8c6a1c129ead862a4d7843192b677334c2324 SHA-256: d1a509f5595d6b2c947b8e4af5734844dfbf16fad249e5f4a9c62d8bce582df3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment 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 of the primary links, however, directs to a known malicious redirector at `ttraff.ru`. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to disguise malicious activity as a document download. The ML classifier strongly supports the malicious verdict.

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/wb?keyword=canon%20powershot%20elph%20160%20instruction%20manual In PDF document text
    • http://files.carabrinkmans.com/uploads/1/3/1/0/131070588/mowimoloxitu_masaleri_wawezu.pdfIn PDF document text
    • http://files.kpadron.com/uploads/1/3/1/6/131636828/5243052.pdfIn PDF document text
    • http://files.planetmediapresspublications-newcomsystems.com/uploads/1/3/2/3/132302995/3583888.pdfIn PDF document text
    • http://files.lombardyreview.com/uploads/1/3/0/7/130776786/tometoli-mebabubop-xizuzorulonu-zitixutimano.pdfIn PDF document text
    • http://files.ntpfx.com/uploads/1/3/1/0/131070124/vosotubuno-mifanuwuvesig-nelopibivi-namotimivixugu.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/1/0432/9072/2469/files/22732748746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0797/5330/files/72449546048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0329/7438/files/60582192476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7301/9808/files/rumomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/69450113410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/58581938432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3490/0637/files/wekalenexajiduf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3636/0351/files/kobopaxexojutugole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3704/6437/files/ronotunakiwofuvesabibo.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7082 5516 bytes
SHA-256: 1a0185d1cf9693641e9e387d7882ecccaf4158309b7458474dcce6412dc60299
font_01_sfnt_off0000832d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x832D 17156 bytes
SHA-256: 5e53cbdc6da6960bf91f3034a28cc2c96be358059166f3ea14cb4575be3c29c6

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