Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f3f06a5bb187a6…

MALICIOUS

PDF

42.5 KB Created: 2020-08-20 13:44:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d11ce4326af3c76d6e117dff0dbae90f SHA-1: a686fbcfe1feb7ea539916fc9e73381c9d7f48c1 SHA-256: 02f3f06a5bb187a6f7f91601b0c6d2d82512e85dafabe0c4f008e396c7bc0c3d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the malicious URL and a list of other URLs, suggesting a link farm or redirection scheme designed to lead users to 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.com/pify?keyword=effects+of+erosion+on+landforms
    • http://files.centerforspiritualawakening.org/uploads/1/3/0/7/130775231/repilogigura_kelidofafalovo_gadenedaloviv_luvebu.pdf
    • http://lamep.shannonvilledrags.com/uploads/1/3/0/7/130740597/6b998c32ea77b81.pdf
    • http://files.elliehutchison.com/uploads/1/3/0/9/130968921/19df7cc4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/talijofazejodo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4040/6695/files/15676667807.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/sulzer_centrifugal_pump_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdf
    • https://cdn.shopify.com/s/files/1/0465/2099/1894/files/buddynice_reality_defines_nothing_ep.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/cadaver_exquisito_libro.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/96441057721.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8852/files/wisivomuxenekegenadukumef.pdf
    • https://cdn.shopify.com/s/files/1/0434/2553/0005/files/juruzefamezeniro.pdf
    • https://cdn.shopify.com/s/files/1/0447/9241/4369/files/aprender_aleman_principiantes.pdf
    • https://cdn.shopify.com/s/files/1/0440/4497/6278/files/21853532765.pdf
    • https://doi.org/10.1002/esp.4880
    • 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_off0000690b.bin
0def45b721340fd7f3f46f8944ded9162d771cca80ff22c430277387a8d71479
pdf-font-stream PDF embedded font (sfnt) at offset 0x690B 5124 bytes
font_01_sfnt_off00007a5d.bin
eabfe1f7f714fb2207ca86945be532d581c754bce8e61a4f808c2b5fe77f6b85
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5D 10240 bytes