Malicious PDF — malware analysis report

Static analysis result for SHA-256 35907cdadcda1e1d…

MALICIOUS

PDF

33.5 KB Created: 2020-07-11 21:36:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f3740783bb16d6e9f36f8e2489774fbb SHA-1: bd3c93edd731a8473658918587d8d87f34cc53c3 SHA-256: 35907cdadcda1e1d9a97d26bf4425d46655c27f6798f518b2bba7774b94ecb55
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search engine results, with the primary link leading to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Andersen storm door closer manual' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly supports the malicious nature of this PDF.

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=andersen+storm+door+closer+manual In PDF document text
    • http://files.rossrubino.com/uploads/1/3/1/3/131381332/7886641.pdfIn PDF document text
    • http://files.shemewe.com.au/uploads/1/3/2/3/132302913/686152.pdfIn PDF document text
    • http://files.myfutra.com/uploads/1/3/1/3/131384018/netax.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/1/0433/0687/7080/files/sasexenumufuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80170273674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/futikuzazojexopuvenewipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51906755497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/guniwilur.pdfIn PDF document text
    • https://bukusuj.files.wordpress.com/2020/06/79083220329.pdfIn PDF document text
    • https://lotodirod.files.wordpress.com/2020/06/9328407337.pdfIn PDF document text
    • https://saxevana.files.wordpress.com/2020/07/47709839111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8859/3571/files/99723881087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/zuwubotodivinedadolida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/gixamewufedugisegopatig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12410546401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71860998709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xazome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/loxidunadubufurepetiverox.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_off00004732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4732 4908 bytes
SHA-256: c5776e99339271034f95e637a3389d67e95902a9ee6c18a8a3a018bb5b9d0d1a
font_01_sfnt_off000057b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57B9 9784 bytes
SHA-256: 43a695e4af227c4dd749f39b90813f624084efa26c161330b9dcddc31dece581

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