Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b995d19d1a2e012…

MALICIOUS

PDF

42.2 KB Created: 2020-08-22 02:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 906645a9579c4d8434c503b6fe3c0cb1 SHA-1: 8055808d8c7d6edf12599af4bb248263eb9d14bc SHA-256: 4b995d19d1a2e012b050a5ade56a4163da6cc3f7691518b3c0f49ad210acfa26
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text referencing an "iphone 4s icloud activation bypass tool" and the malicious URL, indicating a phishing lure. The presence of a malicious redirector suggests the intent is to lead the user to a site that will likely host further malicious content or phishing forms.

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=iphone+4s+icloud+activation+bypass+tool In PDF document text
    • http://kubov.cowgirlcoutureny.com/uploads/1/3/2/6/132696030/nisakukula_nasudatixi_xedudodit_loxuzigegelakub.pdfIn PDF document text
    • http://files.prairieartscenter.org/uploads/1/3/0/7/130739831/f6df14.pdfIn PDF document text
    • http://files.newhavenalphas.com/uploads/1/3/1/3/131379553/2904691.pdfIn PDF document text
    • http://fobum.rushchapel.com/uploads/1/3/0/7/130738568/80815ef0048db.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/1/0436/5336/5910/files/theater_character_development_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8460/1752/files/39200220596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3798/1852/files/39223073690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0228/1633/files/98186464009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1978/6645/files/3d_cad_files_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/desuxisuloja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6550/6966/files/empire_warriors_td_lvl_20_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/paxotubawatukegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0499/2421/files/4401157624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3640/7973/files/lujamepewupulenixud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7629/6614/files/25444146192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8545/4757/files/sutepiwokarufitevapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1669/8526/files/xesufonajofututefoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6769/5511/files/jegamugafesaguxumikev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6114/8836/files/academia_4xx_af_fragments.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F4 5392 bytes
SHA-256: e0f33ac0e6c51afeb001eed5999086573cee4bd9e6d68943e66a2b86e56c9c72
font_01_sfnt_off00007948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7948 10120 bytes
SHA-256: 6ffe8ed051cc2d2dc36c8c2d3dc995eb52684aa7e344ad4c7564d7cdae43ab24