Malicious PDF — malware analysis report

Static analysis result for SHA-256 878e072373a96c32…

MALICIOUS

PDF

44.4 KB Created: 2020-08-19 11:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7b3de2d8b46a5ba00b1472905c5ed0b2 SHA-1: 746ed99ecbc372fd6ae71781dae3ec275a40fa37 SHA-256: 878e072373a96c328cec9e4c2105a7cd9bce2589a46b572da0e98bd34af58922
194 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a redirector service, which is a common tactic for phishing and malware distribution. The document body text, though heavily obfuscated, contains the phrase 'Box tops submission forms' and the malicious URL, suggesting a lure for users to download further content. The ML classifier strongly indicated maliciousness, and multiple heuristics flagged the presence of malicious redirector 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=box+tops+submission+forms In PDF document text
    • http://sopisu.jenkatz-buonincontro.com/uploads/1/3/1/1/131164250/4717401.pdfIn PDF document text
    • http://sival.motorcycletheworld.com/uploads/1/3/1/3/131380429/wugikam.pdfIn PDF document text
    • http://files.mrwhitchermath.com/uploads/1/3/1/6/131607131/ruwofujep_subodoja.pdfIn PDF document text
    • http://xuposiwaf.hotpinktravel.com/uploads/1/3/1/6/131607131/cf4f429406.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/1/0427/9717/0847/files/biology_notes_in_english_for_ssc_cgl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4333/8912/files/satonozala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5699/6260/files/pumunapaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2017/9864/files/jowadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4844/9686/files/mezude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6938/2557/files/tojujepanuzenugapuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/pubakonun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/tesujidak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1691/2037/files/sumuzabamikonusisiror.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/jurnal_penelitian_titrasi_argentometri.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 3

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_off00006eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB3 5060 bytes
SHA-256: 953f34d4dde7adf032c1851b94949df0096b179f41b6052b748d3b5bfa4eff90
font_01_sfnt_off00007fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD6 10852 bytes
SHA-256: efaaa97cdf8e44b998babef301fb4dbd879bc9e409d25c8917a5019288379105

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