Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa788585b7e4070f…

MALICIOUS

PDF

41.5 KB Created: 2020-08-05 04:27:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 724613a55a8418c450aee4ec522cc852 SHA-1: 618b440e4ba215293986a1c588ae4077c69592fc SHA-256: fa788585b7e4070f62ee9f4b08a7a38af3245b20092ea73d83b3d3ec012cc8aa
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. The primary redirector link, https://ttraff.ru/pify?keyword=carbohydrates+worksheet+pdf+answers, is flagged as malicious. The document body, though heavily obfuscated, contains text related to "carbohydrates worksheet pdf answers" and the authoring application "wkhtmltopdf", suggesting a lure to disguise the malicious links. The presence of numerous Shopify links, while some are benign, contributes to a link farm strategy.

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=carbohydrates+worksheet+pdf+answers In PDF document text
    • http://files.burstingbarnsministries.com/uploads/1/3/2/7/132712214/fifomesugob.pdfIn PDF document text
    • http://files.coldwatercreekranch.com/uploads/1/3/1/4/131409309/3908049.pdfIn PDF document text
    • http://files.delloewenthalphotography.com/uploads/1/3/1/4/131437806/6574307.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/1/0436/8770/6774/files/felinegapokasekixug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/86813659155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8762/4344/files/kosavij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7990/9017/files/gevuxemapiwovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/soxakejigizafaxemevexoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1619/0112/files/formatar_s3_mini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/pekorerize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/nuladojoro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lamafavikunidamekisuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/34674450110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/pain_train_tf2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/sasivixalekuzol.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FF 5400 bytes
SHA-256: 61836e15b7182a3a954cb70c61ee817511fa68f9d38b3b25f9a212e4cc304849
font_01_sfnt_off00007664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7664 10144 bytes
SHA-256: f5da432ff243df89423013fce64bd0c894a9756ce110d10eef74ecbb26129189

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