Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b153e1aa18a589…

MALICIOUS

PDF

44.2 KB Created: 2020-08-16 23:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1b8ff1b8231704d884a9f2bdf09e2da8 SHA-1: ae9551feb58fbefe4e95cbf77b89b9df1e9948d4 SHA-256: 62b153e1aa18a5894660dc0c322847626589e66a79d1897b1f07ab65ca25135d
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector infrastructure identified as malicious. The document body, though obfuscated, contains a URL that matches the malicious redirector, suggesting a lure for free downloads or phishing. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic further supports a malicious intent to redirect users to potentially harmful content.

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=format+sql+query+in+notepad%252B%252B In PDF document text
    • http://vagegoj.knightsofmotorhoming.com/uploads/1/3/0/7/130775540/8047844.pdfIn PDF document text
    • http://files.lmbrowsandbeauty.com/uploads/1/3/1/4/131452949/2bbc5c05d8ec48.pdfIn PDF document text
    • http://wujemuzez.disabsdimes.com/uploads/1/3/2/6/132681422/5639903.pdfIn PDF document text
    • http://wuwif.swampfest.ca/uploads/1/3/2/8/132814930/84fef61070b13d.pdfIn PDF document text
    • http://luvimega.caked.love/uploads/1/3/1/6/131637136/rozowejut.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/1/0434/6822/6725/files/59781222968.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5260/4328/files/3091953003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/kofujawurosusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5369/5647/files/78027441218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/84425218566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8765/8141/files/lcci_level_2_question_and_answer_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/99219121295.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/27603598064.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/43474560753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8120/3873/files/58511588681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6897/1418/files/lecture_notes_on_abstract_algebra_groups.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2702/7352/files/baixar_free_to_word_converter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/burorumazujeverufoliwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5654/6467/files/jekerakufofo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6458 5288 bytes
SHA-256: 9ca9634203bfe2974093b340786017f411983b0eb6eff723fa03a8a2d6ae5615
font_01_sfnt_off0000763b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x763B 11072 bytes
SHA-256: d8a22b23be0ce749918396501478e9c06c9de83373fc6fb60c602c36cc2adb3a
font_02_sfnt_off00009bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BFD 1740 bytes
SHA-256: e51ca0148e7e0aae4eb42a5f75a65a08a0f66e9857e45ec5485c6aa46bc5905c