Malicious PDF — malware analysis report

Static analysis result for SHA-256 6935c4a817152175…

MALICIOUS

PDF

37.0 KB Created: 2020-08-25 11:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 292fb0d72667975691a295133751b05d SHA-1: fa4697f349fc6b2f541c85a7839c89a9b6a4f5c4 SHA-256: 6935c4a817152175706c3bd18585f29bdb9f1fb7d2c8d29f518f9cc0df32906f
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 pointing to PDF files hosted on Shopify and other domains, which is indicative of a link farm. One of the primary links, 'https://ttraff.cc/pify?keyword=anbe+peranbu+ngk+hd+video+song', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to redirect users to malicious sites, potentially for SEO manipulation or to serve further malicious content.

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.cc/pify?keyword=anbe+peranbu+ngk+hd+video+song
    • http://bikezag.sunshinecoastcelebrant.net/uploads/1/3/2/6/132680981/e88b8f7fc10e.pdf
    • http://sugel.livingbarsaddles.com/uploads/1/3/1/6/131637376/2498633.pdf
    • http://vedaworu.cdsacademy.co.uk/uploads/1/3/1/3/131378776/rafizik.pdf
    • http://tisuzogab.blair-ray.com/uploads/1/3/0/8/130873825/2897778.pdf
    • http://files.holistic-iasis.com/uploads/1/3/2/3/132303238/f34bc0733e2e6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5560/4124/files/konebubenijo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/gepopulob.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/wupudurutufegevu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3655/6962/files/vapivonusoweverabewumiriv.pdf
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/harriet_beecher_stowe_biography.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/8120314250.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/viwuxedut.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/14191169375.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/durumivakuzazube.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/38262154592.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_off0000535d.bin
4a253846a1bc5056c850cd2ffb3453c25a4b60528e8f9b909ee2d7deedbc48e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x535D 5444 bytes
font_01_sfnt_off000065cd.bin
0904fef93e3b0f9fa57f9ed3741edd8951a8885c63699f7db184974b1bc33290
pdf-font-stream PDF embedded font (sfnt) at offset 0x65CD 9844 bytes