Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bdfcbad86412b58…

MALICIOUS

PDF

81.6 KB Created: 2020-07-30 01:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cd33039b91c274e9ce17b3854a7437a7 SHA-1: 2a1db9403ff9af6831c948c7ba00a1a7caa595f9 SHA-256: 7bdfcbad86412b58a3e832930ad3a13808c16f959f7862731258032585c3d654
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm and a specific lure for a '10th maths guide pdf download 2020'. The primary link identified, 'https://ttraff.cc/pify?keyword=10th+maths+guide+pdf+download+2020', is flagged as a malicious redirector. This indicates a phishing attempt to direct users to malicious infrastructure under the guise of providing a document.

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.cc/pify?keyword=10th+maths+guide+pdf+download+2020 In PDF document text
    • http://files.jenniferhayesstl.com/uploads/1/3/1/4/131407233/piwabekine.pdfIn PDF document text
    • http://files.littletonpreschool.com/uploads/1/3/1/4/131409244/filibefuxedewugudav.pdfIn PDF document text
    • http://files.butteswcd.org/uploads/1/3/2/7/132740814/redexokinuz.pdfIn PDF document text
    • http://files.pd-parenting.com/uploads/1/3/0/7/130739704/2960027.pdfIn PDF document text
    • http://files.mikeslea.com/uploads/1/3/1/3/131379384/1e22a7e.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/1/0436/2820/0096/files/favararizikimuleta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2165/3400/files/kabokezabifisem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/zojazopifolinoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/21856958163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6797/3538/files/jixexisevoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/xutewurivavix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3287/0037/files/sutokopumizabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1464/2070/files/gafuforuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/zelexote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/velokiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4209/2694/files/35402206229.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000de80.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDE80 19952 bytes
SHA-256: e352dcd01dde5107aadf92637cb34440926f3a3f1725c524ff9ebc192e8d8de9
font_00_sfnt_off0000cba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA5 5564 bytes
SHA-256: b40af301317d333f9ddf64f3c4c25b977c5b70bea43eb2de49a1de58813d43c6
font_02_sfnt_off000109c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C3 10088 bytes
SHA-256: 319b6fe72cbe20e55342bdd1e1ba08a3a735284879ea83a7173b77970f1a6893
font_03_sfnt_off00012c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C64 2832 bytes
SHA-256: a12908a88df35a7e9eb57470e9a94a806bb52df392ce88a62d07cba2b79b9044