Malicious PDF — malware analysis report

Static analysis result for SHA-256 1839c557e521a8db…

MALICIOUS

PDF

101.8 KB Created: 2020-08-11 01:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 269e3d65e8169e4765dce73b03ef4c1a SHA-1: a97a1705e231e4f9022aa2efc9cede5a17e5b257 SHA-256: 1839c557e521a8db5cd2472b31521c591aeb3591e2c11bf07c29acd4378ab012
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which point to a redirector service (ttraff.com). The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a high likelihood of malicious intent, likely to phish for credentials or deliver further malware. The ML classifier also strongly flagged this PDF as malicious.

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=biosynthesis+of+auxin+pdf In PDF document text
    • http://files.pharosjot.com/uploads/1/3/1/4/131453610/roradovixem_vemexisegida_farewilesojawip_tarowev.pdfIn PDF document text
    • http://files.quicknezautoleasing.com/uploads/1/3/0/9/130969915/dawubal.pdfIn PDF document text
    • http://purufu.georgeellis.co/uploads/1/3/1/3/131380505/famunidem.pdfIn PDF document text
    • http://files.fleurieurecycling.com/uploads/1/3/2/7/132740670/9884728.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/1/0432/8790/4422/files/30314909963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3761/3461/files/72955186340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2934/9030/files/65022544235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3296/1443/files/9645812696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7735/4143/files/jinuvelumezopuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3140/3423/files/computer_networking_tutorial_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/vilesotebijabajanos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3176/3864/files/kiruxigaluxowuxof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4393/7690/files/nakop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4302/8120/files/58830261495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4788/6743/files/git_github._com_permission_denied_publickey.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_off00013ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA4 5220 bytes
SHA-256: e128cbcdf4c0b8b2ca62d34e7fa50b2a000182ac372c03787c83569db63012d6
font_01_sfnt_off00015076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15076 10592 bytes
SHA-256: 9b4da3ab06dcff8abf05830c44c9be4c380264b696e3bfb722d93b6399c81b6f
font_02_sfnt_off000174a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174A8 16148 bytes
SHA-256: 1a2b76eb92621148de57a48589384f2ed1ce1add53d2a8f9a0414c0ea737f4f8

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