Malicious PDF — malware analysis report

Static analysis result for SHA-256 1767ecfb33b2d0b5…

MALICIOUS

PDF

34.4 KB Created: 2020-08-16 11:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 09cfbe762c03e6ddd89b775a435d2b51 SHA-1: fac71e3b12ca5b772d6b9d3926a790a0e51b73fa SHA-256: 1767ecfb33b2d0b556ad3cb7f10db17ccdfd97c8571c1fbfb05ee3a12bd1b7fb
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=zap+mama+iko+iko'. The document body also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links points to a link farm strategy, likely for SEO manipulation to distribute malicious content or phish users. No scripts were extracted, but the embedded links are sufficient to infer malicious intent.

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=zap+mama+iko+iko In PDF document text
    • http://files.camdenedupartnership.com/uploads/1/3/1/6/131606492/zivugumadadaz-rugefoge-tegepila.pdfIn PDF document text
    • http://zewine.bhsumath.com/uploads/1/3/1/3/131398591/kerirowojuwe.pdfIn PDF document text
    • http://files.cyrphotography.com/uploads/1/3/0/9/130969158/3951034.pdfIn PDF document text
    • http://pogonufoz.chamber-choir.com/uploads/1/3/1/6/131637136/bajavanumalotof_kudugazog_revuxetat.pdfIn PDF document text
    • http://pilip.nmussoarchitects.com/uploads/1/3/0/8/130813528/f35865616a04346.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/1/0430/7963/1012/files/41320136438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5083/5876/files/53515710733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/paytm_barcode_image.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/51008470445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/2708/3943/files/alphabet_writing_practice_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0533/0083/files/37776614276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1370/5625/files/christian_baby_boy_names_with_meaning_gift_of_god.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/xuwesibefuwopula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7739/4847/files/41423737633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/xelopejine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1335/6189/files/wudot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0184/5659/files/jumbling_reasoning_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/divegemodunob.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_off00004b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B6D 4680 bytes
SHA-256: 966f68c217268da0a81bdd814f7f3e88a7cb8c68e960f026240e69bb5544db86
font_01_sfnt_off00005b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B4B 9816 bytes
SHA-256: 85134fc797417bda8104aa301d891df891e092012a3b1d806feee07f9774ae0d