Malicious PDF — malware analysis report

Static analysis result for SHA-256 658857f855475f2c…

MALICIOUS

PDF

50.2 KB Created: 2020-07-30 14:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0cf0f01cd1aad6e5f216b0a088d5a62c SHA-1: b2ea2d7b2e8f37cabe3842bec7c9127692dbb84e SHA-256: 658857f855475f2caa16b38c5a77e2497cc21f2e2611b8a9b5508b61a6c6288b
202 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are hosted on Shopify and appear to be part of an SEO link farm. The primary redirector URL, 'https://ttraff.com/pify?keyword=irrigation+and+water+power+engineering+by+punmia+pdf+free+download', is flagged as malicious. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, but the overall structure suggests a phishing or malware distribution attempt.

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=irrigation+and+water+power+engineering+by+punmia+pdf+free+download In PDF document text
    • http://files.peacepartners.co.uk/uploads/1/3/2/6/132681479/2a52deff7.pdfIn PDF document text
    • http://files.manchesterctpal.org/uploads/1/3/0/7/130775668/aa6966b37c75f.pdfIn PDF document text
    • http://files.shaindeesmakeup.com/uploads/1/3/0/7/130739444/8812125.pdfIn PDF document text
    • http://files.showdownvapor.com/uploads/1/3/1/4/131437044/tulujijujer.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/1/0432/2898/7547/files/42951528614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0693/4688/files/62108175765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0874/3835/files/nejaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1671/5429/files/23504680023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1387/2548/files/sajumapituka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6354/1917/files/fudotefotik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3689/1544/files/muvumufexilose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5785/4102/files/vafubefafujomok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9924/3174/files/jolikepapunanigeselusepov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9450/6661/files/lafepibiwudeguxofarad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4295/5687/files/duparoxebiniv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6521/3089/files/63183715083.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_off0000702e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x702E 5336 bytes
SHA-256: 0f826d4fabfe122745bf3fba7004376b1931913887d6e1e6d6bfd49e7651dbab
font_01_sfnt_off00008238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8238 2116 bytes
SHA-256: 2d35fe1b112251630f6c3e185fb4bf58c6327cea99f60afab3ca0473214b5b30
font_02_sfnt_off00008c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C04 15132 bytes
SHA-256: 2f48312f1bde3f078f26ee1db3c3fe844029953142c0ab9ffd722c77bd006a9f