Malicious PDF — malware analysis report

Static analysis result for SHA-256 c57a3ed939893a25…

MALICIOUS

PDF

44.6 KB Created: 2020-08-04 06:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8dea196dcedda7722abef53f7d02f2a3 SHA-1: ccbbf961130c45e6a3af65e20c7c4524b137d72d SHA-256: c57a3ed939893a25dad3a0fc9823462a7021e27f18463ba227357a80dc0f78c5
234 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious redirector. This indicates a link farm or SEO poisoning attack designed to lure users to malicious sites. The document body contains obfuscated text and the target URL, suggesting an attempt to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=bernard+shaw+man+and+superman+pdf In PDF document text
    • http://files.mitsukoyoga.com/uploads/1/3/2/6/132681012/b9a1636.pdfIn PDF document text
    • http://files.multidimensionalchromatography.com/uploads/1/3/1/3/131383650/1915314.pdfIn PDF document text
    • http://files.lataca.co.uk/uploads/1/3/1/0/131069934/9190269.pdfIn PDF document text
    • http://files.kristenjoanphotography.com/uploads/1/3/1/3/131398145/zanixuw-jofamop.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/1/0429/4954/2047/files/todojonawinekinalote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6365/7119/files/sirokawede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7740/2778/files/95655264816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5993/6421/files/86827939081.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6350/9146/files/7146395340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9275/5111/files/swing_trading_strategies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4071/0566/files/minecraft_pe_id_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rerotapok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/gerepodegewigazirupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7995/8679/files/zimuxijewonab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1763/3945/files/tajutosilofibirasomixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3331/0870/files/dilubaxepulutifax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7364/2406/files/watch_dogs_2_skidrow.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_off000070a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A5 5388 bytes
SHA-256: 31a0c402e0877bffb5d63ca5a7163e0b7bc763484981d33356e254596a48db40
font_01_sfnt_off000082e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E3 9980 bytes
SHA-256: ffeb3f0cce462cbe6cd902e7a8abf67cfd6ada194b1e02401287a4fb7d5c4d0f