Malicious PDF — malware analysis report

Static analysis result for SHA-256 8850cd87e5899200…

MALICIOUS

PDF

49.7 KB Created: 2020-08-21 22:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 35308194dc52127c85e9780a20643a28 SHA-1: e3bb4b522190ffb451656bd8aab9cc5c3e8f0b6a SHA-256: 8850cd87e5899200b40605efde34a3be8780cbe460a57398a14f0ce63b652a39
194 Risk Score

Malware Insights

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

The PDF contains embedded links and text that direct users to a redirector URL, which in turn points to a Shopify domain hosting PDF files. The primary redirector URL is associated with malicious activity, suggesting a phishing or scam campaign disguised as a free download. The ML classifier strongly indicates maliciousness, and the PDF structure includes multiple external links, some of which are SEO-optimized to appear as legitimate download sources.

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=batman+arkham+knight+pc++highly+compressed In PDF document text
    • http://tefesad.growingupguinn.com/uploads/1/3/1/8/131871462/degujujogixefeguzura.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/1/0440/2269/4046/files/73976978863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6687/4266/files/3526994979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4748/3557/files/canzoniere_petrarch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/xitubenatuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2210/6269/files/15518694170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xezunegudowafosixezuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2366/2236/files/android_studio_java_version_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1483/0749/files/agile_mind_constructed_response_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/konozulevidubuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/6690/1924/files/consumer_reports_stick_vacuum_cleaners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/lojazojozox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0783/5303/files/daxuvunusax.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_off00006443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6443 5704 bytes
SHA-256: 371df747392d0fa57e7d844170e10e694d9d5e186028b4803ce94fbd67a5a658
font_01_sfnt_off0000777a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x777A 14196 bytes
SHA-256: 43bf4d457f5b53ea37fabd132f8277f94f69971a75b8c194638acec93a99d5ed
font_02_sfnt_off0000a495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA495 16068 bytes
SHA-256: b1615e29a4fe6c7320d553a30418b4fece26933a192be804fa4a6c1955e67a67