Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaa857edde121b6f…

MALICIOUS

PDF

119.7 KB Created: 2020-08-04 19:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 51b30a621370a2b5df8411aff8ea7408 SHA-1: 1908e2d94ec78f9db8592e233246a58152df32cb SHA-256: aaa857edde121b6fbf2e210295648b518ba460262af1f8e58c280ccab2dd98bd
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the one flagged by the heuristic. This suggests the primary intent is to redirect the user to malicious infrastructure, likely for further exploitation or phishing.

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=sjogren+s+syndrome+treatment+guidelines+pdf In PDF document text
    • http://files.outerreefjewelry.com/uploads/1/3/2/3/132303151/0db1eec9e5db54.pdfIn PDF document text
    • http://files.intucoaching.com/uploads/1/3/0/9/130969357/3cce9aad.pdfIn PDF document text
    • http://files.magicmudceramics.com/uploads/1/3/0/7/130740462/c3a76e7c0d8.pdfIn PDF document text
    • http://tojoz.stlinuslions.com/uploads/1/3/0/7/130776644/7374301.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/1/0433/3400/8987/files/can_i_get_photoshop_for_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8326/8263/files/pozegirimolife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5757/8138/files/two_videos_side_by_side.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0802/3966/files/jidoxezefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/refefabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6675/1131/files/10328066458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/96490101769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2193/3466/files/2177584838.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/jurozejulubilafaliti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/vixibusiwarifiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/74475738038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/gevomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4305/2953/files/vosawiferinu.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_off00018315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18315 5640 bytes
SHA-256: dbcb18b93e00caef91ca2eb73a8e897620fb0a20a73bedda73911c112b2c3528
font_01_sfnt_off0001963c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1963C 10788 bytes
SHA-256: ce3949530ed41d39561ca5eed7a32c527c790b23cabde6cf59dfef6ae68c8711
font_02_sfnt_off0001bb09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB09 16272 bytes
SHA-256: 09881c6202a27ad7063d4a4b66a90f82d2a13515af45feb852b0660da897b3db