Malicious PDF — malware analysis report

Static analysis result for SHA-256 623ff90b7b0ba3cd…

MALICIOUS

PDF

41.3 KB Created: 2020-08-07 16:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8f55d0db97a7b9411f25b6beec590709 SHA-1: 6c1dcceb418aee7c3b512ca491db2d828e3eb9c4 SHA-256: 623ff90b7b0ba3cd68f0cf67eeb860e0259ba7411c1216e2b5a25c7b6720b445
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or phishing lure. The primary redirector URL, 'https://ttraff.ru/pify?keyword=ansiedade+autocontrole+augusto+cury+pdf', is flagged as malicious. The document body, though heavily obfuscated, contains this same URL, indicating its central role in the attack. The presence of many Shopify URLs, some benign and some unknown, suggests an attempt to blend malicious links with seemingly legitimate ones.

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=ansiedade+autocontrole+augusto+cury+pdf In PDF document text
    • http://files.mounthebronstem.com/uploads/1/3/0/8/130873728/dfa8a.pdfIn PDF document text
    • http://files.torirobinson.com/uploads/1/3/0/7/130740249/1013708.pdfIn PDF document text
    • http://files.colusalafco.org/uploads/1/3/2/6/132680784/f159e4238c80e99.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9239/3640/files/davogagofoxonegaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/18747227360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/94834841662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2693/1099/files/ball_lightning_cixin_liu_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2247/4651/files/38059985537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6367/0944/files/zazonaved.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0371/5481/files/57516112417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8511/0175/files/61261646871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5348/2137/files/bibopakuzokiluritorapapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84407481133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/74924398145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/bekidito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/97233461172.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 4

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_off000055eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55EB 5296 bytes
SHA-256: 3e7635ab058b50d86acb7e4a8ee82bc77b9509a4c421b6142362b5d8c775808e
font_01_sfnt_off000067ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67FF 9936 bytes
SHA-256: f2206cb2db0edcf0c7cd544cac91788892aad309e5d0e32185f22d67ec0dac78
font_02_sfnt_off00008a07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A07 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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