Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d5bbbdc845d6aaa…

MALICIOUS

PDF

75.6 KB Created: 2020-07-18 02:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b73b1dc59ac426a375f3d447782de563 SHA-1: 0da574916baf43973f6ffcd6870407a06e0d63a2 SHA-256: 6d5bbbdc845d6aaae881606749f75d276ee899224440ea398ae0fecff1b702d8
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to link farms designed for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/wb?keyword=violencia%20contra%20la%20mujer%20en%20guatemala%20pdf
    • http://files.lepinkandco.com/uploads/1/3/1/3/131380966/7173eb110856d.pdf
    • http://files.oddballcraftscreations.com/uploads/1/3/0/9/130970003/7522565.pdf
    • http://files.iwfgeorgia.org/uploads/1/3/1/4/131455883/dofez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://nagarelev.files.wordpress.com/2020/06/pikotikasupavut.pdf
    • https://lipurenipagu.files.wordpress.com/2020/07/kepakodikolagilapikulefu.pdf
    • https://zadedow817229965.files.wordpress.com/2020/06/rudizelira.pdf
    • https://zawigexirap.files.wordpress.com/2020/06/tunebekuzaxemanugem.pdf
    • https://mesolal.files.wordpress.com/2020/07/tuzaguxozilafutedomi.pdf
    • https://xukukisogupu.files.wordpress.com/2020/07/xusajoparuwurebibowakefof.pdf
    • https://fujipoveju.files.wordpress.com/2020/06/tavusewikopatetifovuk.pdf
    • https://kebusura.files.wordpress.com/2020/06/zupubunedoles.pdf
    • https://cdn.shopify.com/s/files/1/0437/6877/4814/files/kokizejotafupikenilux.pdf
    • https://cdn.shopify.com/s/files/1/0431/4634/6658/files/1107271907.pdf
    • https://cdn.shopify.com/s/files/1/0433/8306/2678/files/siwilipobora.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8244/files/31046749466.pdf
    • https://cdn.shopify.com/s/files/1/0435/1908/2651/files/rokozejokodidozudi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6946/4991/files/45030631346.pdf
    • https://cdn.shopify.com/s/files/1/0433/0484/5465/files/14855038225.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e787.bin
340b70d3890a54e752cdb613a70290f34c912e6b61b962fe71473d87d4b3aac5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE787 5220 bytes
font_01_sfnt_off0000f934.bin
6baa5689ef28ff541a639ffc975ca0a7abf44f7211842dbc8041a4aaec155e69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF934 11580 bytes

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