Malicious PDF — malware analysis report

Static analysis result for SHA-256 52533e377bbd6f6e…

MALICIOUS

PDF

45.0 KB Created: 2020-08-07 15:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf9b4795250adb160efd4acc15024e23 SHA-1: 30bc64d3e432422d4aa5aafd52caed57ef214b2a SHA-256: 52533e377bbd6f6e5e19d32f813f428023d434d7fb0fbfd251d59b4624181ebf
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to malicious infrastructure, specifically a redirector at 'ttraff.ru'. This is further supported by heuristics indicating a malicious redirector and an SEO link farm. The document body, though heavily obfuscated, contains the same redirector URL, suggesting an attempt to trick users into downloading further malicious content.

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=autodesk+inventor+2020+what+s+new+pdf In PDF document text
    • http://files.barndoorllc.com/uploads/1/3/2/3/132302924/73f4fd7b4ee401.pdfIn PDF document text
    • http://files.emmausbaseball.com/uploads/1/3/1/3/131397971/wevudizuseke.pdfIn PDF document text
    • http://files.normaniclothing.com/uploads/1/3/1/8/131858592/vozegunowilulupezej.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/1/0429/2296/7207/files/12779958366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3011/7542/files/batho_pele_principles_explained.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/1699066890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5883/9198/files/bowuxovijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/poultry_management_practices.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7879/4920/files/filariasis_treatment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5699/6247/files/furos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1959/9004/files/59748171502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7727/8627/files/vufasafipokaniweritoluni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/53651151046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0622/9654/files/8457486410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/36522596041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/rixaduj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5100/8671/files/2715818010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2417/0664/files/bejoxupakopakanaborezup.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_off000063ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63ED 5456 bytes
SHA-256: 85d03968d33be7fc41952018327ee850235a694432be55cbf1d6faf8340672d2
font_01_sfnt_off00007688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7688 9980 bytes
SHA-256: ad6fd6ce43c1062321cd802f49a4fbd01ca12830ada3e2404e70e238fae55fcc
font_02_sfnt_off000098a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A1 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f