Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68a781649a13b6d…

MALICIOUS

PDF

45.0 KB Created: 2020-07-30 13:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4c37a588a1a5157731feff0b2608e6ee SHA-1: 5957270e0210d2fbe88941b1f5d60dc84c9791e5 SHA-256: f68a781649a13b6d0dd0a3644d4d672861bdc25af13b06aa47c48f562b772e5c
194 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, a common tactic for SEO link farms and redirecting users to malicious content. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to 'factores bioticos y abioticos pdf', likely intended to trick users into clicking the embedded malicious links.

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=cuales+son+los+factores+bioticos+y+abioticos+pdf In PDF document text
    • http://files.akademikreatifindonesia.com/uploads/1/3/1/6/131636828/41bf1c5.pdfIn PDF document text
    • http://files.wisefeline.com/uploads/1/3/2/7/132740467/rubajalolulegekogixe.pdfIn PDF document text
    • http://files.mrflynnhistoryclass.com/uploads/1/3/2/6/132682239/rebulegofigizegerej.pdfIn PDF document text
    • http://files.supercoolyconcepts.com/uploads/1/3/1/0/131070327/ab9bea2d37.pdfIn PDF document text
    • http://files.thekoalaproject.org/uploads/1/3/2/8/132814935/tomanog.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/1/0431/8907/6117/files/11677784761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9146/0247/files/27553488278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9619/3686/files/69104280569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6078/9409/files/vanuvoxekofisosavegenubaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46552055365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8584/0036/files/45207338583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1198/0964/files/9938623943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/vomugolivakalifogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2644/0607/files/sibefajafe.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_off00007149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7149 5296 bytes
SHA-256: ee5e5506ed1c670c0586169fbc2ca5ab05e88cf523811b929c5140c6ca24407a
font_01_sfnt_off0000835c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835C 10320 bytes
SHA-256: ffcd6378fa4242455cbad702ced763e1bdf02fe323becde414170a1e8a3efdfe

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