Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c41eaf2330ca23…

MALICIOUS

PDF

46.3 KB Created: 2020-08-14 02:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 088988518b90ef4891f7b711720e5c2d SHA-1: e06b2b9ff253600cd270814bc0151670273d79ab SHA-256: 71c41eaf2330ca238091031c3a6bded74eb974eae47fc577db9170b03679524c
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as educational material, but they redirect to a malicious infrastructure at 'ttraff.cc'. This suggests a phishing or scam attempt, likely using the document as a lure to drive traffic to malicious sites. The ML classifier strongly supports the malicious verdict.

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.cc/wb?keyword=imperialismus%20unterrichtsmaterial%20pdf In PDF document text
    • http://files.saygereviews.com/uploads/1/3/1/0/131070294/1778516.pdfIn PDF document text
    • http://files.indianasal.org/uploads/1/3/0/8/130874567/xilif-kevojurine-levozejife-ronuxuk.pdfIn PDF document text
    • http://files.tudublinsummerschool.com/uploads/1/3/0/9/130969639/lojegi_sidudozule.pdfIn PDF document text
    • http://zudevox.zachzaitlin.com/uploads/1/3/1/4/131406717/vupiguma_zikizi_figose.pdfIn PDF document text
    • http://files.makingsiliconebabies.com/uploads/1/3/2/8/132814375/4076558.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/1/0428/9835/8432/files/fejatomamegebuwugibuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2916/6242/files/pokemon_gold_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6499/1637/files/48477514410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/40439482249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6225/3982/files/remove_white_background_from_illustrator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0677/8777/files/spanish_adjectives_list_a_z.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6661/3141/files/76272699808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4995/0111/files/18632423094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5123/7022/files/benoit_mandelbrot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1007/1460/files/rxprep_2018_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9382/6463/files/23324288144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2358/7736/files/pifuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/jigekanador.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_off00005f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F91 5332 bytes
SHA-256: d00566c40777b0c964844a2b4306371dc2f867c7e75ec13fbfafbe505e3cc640
font_01_sfnt_off00007176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7176 10852 bytes
SHA-256: 248851eb19964914907dc2505aebc4c50b5b0e9cb8bad7f68a98ef237665b03a
font_02_sfnt_off00009552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9552 16076 bytes
SHA-256: 0b4bdbf031826b8fe301f8b6a8a1f26a7af7d7ba100a217828ecbf7a6979f704