Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a5bb9afd8ce062…

MALICIOUS

PDF

49.7 KB Created: 2020-08-06 18:30:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e3c69addd30643da70621ba1763424c SHA-1: a9071f986f74654c54ad51c5910fda8529a9a6ed SHA-256: 82a5bb9afd8ce062640b80f237d14f85601bc8bf032c1056b4eb5e1f71e1ec28
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a search result for 'agenda 21 map pdf'. The document body, though heavily obfuscated, also contains this URL. The PDF also hosts a large number of external links, many pointing to Shopify, suggesting a link farm or content distribution network used for hosting malicious files. The ML classifier strongly indicated maliciousness.

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/pify?keyword=agenda+21+map+pdf
    • http://zalubawu.notwithouthopeproject.com/uploads/1/3/0/7/130739718/rarutajel-vilufavudosa-novisumijesujex.pdf
    • http://files.justbephotos.com/uploads/1/3/0/7/130775934/tamirotorun.pdf
    • http://files.pretoriawestmethodist.org/uploads/1/3/1/3/131383754/bewolekevito.pdf
    • http://files.braysbargainzzz.com/uploads/1/3/2/8/132814241/dunijubakosena.pdf
    • https://cdn.shopify.com/s/files/1/0438/3752/2085/files/migrating_subversion_to_git.pdf
    • https://cdn.shopify.com/s/files/1/0432/6634/3072/files/vupupugogudelefon.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/kosanenobevovut.pdf
    • https://cdn.shopify.com/s/files/1/0435/5689/6927/files/95380256699.pdf
    • https://cdn.shopify.com/s/files/1/0431/2409/7191/files/40779552543.pdf
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/zomano.pdf
    • https://cdn.shopify.com/s/files/1/0432/7319/1587/files/dasunakulinakarezi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7380/files/23240237358.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/vocabulary_word_list.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5508/files/vimalevelizerimax.pdf
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/sununaxolosilerip.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008414.bin
ca8d985382c859a65010da99932520b24b1c2c190161c7dd739a1ed68eb0e5cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8414 5228 bytes
font_01_sfnt_off000095e1.bin
bb5e82efa812358e80557a46aee3d1ff625b5c80bc38d6d31e4fb58a4e7358f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x95E1 10580 bytes