Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca51ace7d58a7f4…

MALICIOUS

PDF

43.8 KB Created: 2020-08-08 00:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f1064bb04b9312d02101f5bd365ff53d SHA-1: 7ec5b532dedc4516b7d54ba1d36670a5369712e9 SHA-256: 1ca51ace7d58a7f4feed79e322edd3a9bd27f7de3b2f1fd25108903865d6111a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains this URL and other embedded URLs that appear to be part of a link farm. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be luring the user to a malicious site via the embedded link.

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=keyboard+and+mouse+skills+pdf In PDF document text
    • http://files.signingacademics.com/uploads/1/3/1/0/131070611/gorewajepagu_jamariririvuve_xigigozedav.pdfIn PDF document text
    • http://files.mbilder.com/uploads/1/3/1/4/131406816/1092288.pdfIn PDF document text
    • http://files.plantinggems.co.uk/uploads/1/3/2/6/132682868/solijilerumikiwegife.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5911/6182/files/toroputatedugareniz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9981/4056/files/mamopimug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0415/8375/files/52961902916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8683/0998/files/25996249063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7142/2115/files/70031079372.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/17249887390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38804475130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9384/3358/files/easy_english_story_books_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8728/0790/files/bin_sachivalay_paper_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9476/8802/files/8182604155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/17828277991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/38846961262.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4F 5264 bytes
SHA-256: 5daaec7f8090e484b111c221091f1cbe6da16332fabe4d8ad84fa9a8da11c8bc
font_01_sfnt_off00007107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7107 10176 bytes
SHA-256: 401fea86a829637a9657e68b97f3e77c6b68ac9683ce71cd4d379a346df95953
font_02_sfnt_off000093ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93EE 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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