Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cee54712648a76a…

MALICIOUS

PDF

79.8 KB Created: 2020-08-19 14:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b651fc6143529795c720417596e32eba SHA-1: 0644f2bd120bce4a75133af64e513424ae568250 SHA-256: 5cee54712648a76a2382b7f0ebdb79765ffe030b5e76a76c619b0541362d98ab
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to malicious infrastructure, disguised as a search result for '90s bollywood dance songs'. The ML classifier strongly indicates maliciousness. The embedded URLs suggest a phishing or content-luring campaign, likely intended to lead users to malicious sites or downloads.

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.com/pify?keyword=90s+bollywood+dance+songs
    • http://files.ypcusa.net/uploads/1/3/1/3/131378837/6662182.pdf
    • http://fatid.stwilfrids.org/uploads/1/3/2/6/132683003/6236287.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9004/3287/files/5935546374.pdf
    • https://cdn.shopify.com/s/files/1/0453/2440/2843/files/current_affairs_in_english_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5127/files/authorization_letter_to_collect_documents.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/60039315401.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/xilosevuposesede.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/bavosulefuwixabozemotazis.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/miopa_hipermetropa_y_astigmatismo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/semujodit.pdf
    • https://cdn.shopify.com/s/files/1/0431/0309/2898/files/66068726294.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mazimuzoxoku.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_off0000f1d4.bin
e4a6d2322bad911be6537db212fbe4e5ae857dc2e349cf44f45e8f55312d404b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D4 5548 bytes
font_01_sfnt_off000104cd.bin
5586399983c62518a70ef32c27d6168db7b39fdb21b9c4c3c1ad223018084ba9
pdf-font-stream PDF embedded font (sfnt) at offset 0x104CD 14484 bytes