Malicious PDF — malware analysis report

Static analysis result for SHA-256 2993cf31c017c155…

MALICIOUS

PDF

49.5 KB Created: 2020-08-07 15:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5d38d55fd29fd38e2b84fabc5c20a8cc SHA-1: 236ac11a79bee3d2800c7b655beaa9b846874a12 SHA-256: 2993cf31c017c1552b4600bb5ae438b3143749ffe1b2b7eab6211e93587dcf02
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in

The PDF file contains a significant number of embedded links, many of which point to a link farm designed to redirect users. The primary redirector URL, https://ttraff.ru/pify?keyword=printable+metric+ruler+actual+size+pdf, is flagged as malicious. This indicates a likely attempt to lure users to malicious sites, possibly for phishing or to download further malware. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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=printable+metric+ruler+actual+size+pdf In PDF document text
    • http://files.2028uae.com/uploads/1/3/2/3/132303312/7164322.pdfIn PDF document text
    • http://files.procuity.com.au/uploads/1/3/1/3/131378897/065869ad5d.pdfIn PDF document text
    • http://files.atforthopedics.com/uploads/1/3/0/7/130739072/9343074.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/11009004276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/5762/2689/files/convert_arabic_number_to_english_in.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4636/2523/files/66457220817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/metabinileperewivewan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0611/3430/files/mozegewadebinupukewom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/25301116243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/bisubadopegugirutanan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/41113126261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2650/4086/files/zaniz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/61843066954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9997/9930/files/66944157003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4579/5493/files/bsc_cbz_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/72136579059.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_off000075a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A5 5264 bytes
SHA-256: 025d6801d3b67bb8b9023e7f00224b296e6b3a1affafc08f6e4267e4fc691997
font_01_sfnt_off00008764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8764 10260 bytes
SHA-256: 7676da01dc1d64c930fe0ab48ee79e0f4d6979aae16165d802f04f86f56de5b4
font_02_sfnt_off0000aa7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA7D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e