Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4fd94863172f6b…

MALICIOUS

PDF

47.2 KB Created: 2020-08-22 22:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7fcfaeeb314988699ee21cb4dffc8a20 SHA-1: 61f473737cc564ca9d918c807a79ac7cf4ffcfee SHA-256: ee4fd94863172f6bb70961b230e5909df672defc20e47f09bd9160f526806baa
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=congruent+triangles+coloring+worksheet', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure. The presence of numerous links and the identified malicious redirector indicate a link farm or redirection attack pattern.

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=congruent+triangles+coloring+worksheet In PDF document text
    • http://duwene.katiegreenedoulaservice.com/uploads/1/3/1/4/131437756/fixutisilodi.pdfIn PDF document text
    • http://bokinov.elephantmomma.com/uploads/1/3/1/1/131163992/pezak-lejotena-tonosakusufada-lajot.pdfIn PDF document text
    • http://wotakini.whiteoakplantationbr.com/uploads/1/3/1/6/131606027/777896.pdfIn PDF document text
    • http://files.classicmassagestudio.com/uploads/1/3/2/3/132302940/luzugudevizilim_ravixerulamuna.pdfIn PDF document text
    • http://weluxetej.msspadc.org/uploads/1/3/0/7/130738732/fivowipa.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/1/0430/5531/7149/files/botawegorobokakogijonokov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2869/8520/files/proxy_voting_form_template_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2109/0471/files/35878563109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/tedaviwuliwufinetufofoxix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/rpf_ancillary_answer_key_2019_group_b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2602/2554/files/kijawap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2876/7143/files/kufopagitagaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/52743224669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/22552145340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/619593971.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9460/5975/files/pegibimadawolamagaxuka.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_off000065dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DC 5124 bytes
SHA-256: 8b4d0afee31ef1c5f4286bf606e6ed2334e51359bf08b06e29958bb232a095af
font_01_sfnt_off00007757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7757 10120 bytes
SHA-256: a44d40de5976546943c7c224e3c791941221121628109ed674259571663e6311
font_02_sfnt_off00009a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A3C 16168 bytes
SHA-256: 8c1e3298cb301b6aa2c2aeff0a89e1cafee6626e56d5ffa98ad52a7598c40df9