Malicious PDF — malware analysis report

Static analysis result for SHA-256 711a82a504927036…

MALICIOUS

PDF

53.8 KB Created: 2020-08-11 00:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 606d72a44982c9166d9284b11f3d4046 SHA-1: e4bc33bf3c3383fdb14266962d48df567a67270f SHA-256: 711a82a5049270363c120e9a9168a95ebb2fe51e1572715c7bfd21064a2917b6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. The document body also contains this URL, suggesting an attempt to trick users into downloading a PDF which actually leads to a malicious site. The PDF also contains a large number of external links, indicating a link farm for SEO manipulation, likely to distribute 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.ru/pify?keyword=origin+and+development+of+sociology+and+anthropology+pdf
    • http://nexuves.purebredfitt.com/uploads/1/3/2/7/132741194/9101650.pdf
    • http://files.roscommonsocietyofny.org/uploads/1/3/2/7/132710624/sulizibuge.pdf
    • http://zokojami.stpetergreene.com/uploads/1/3/1/3/131398097/9e2d2448.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/6879/8614/files/sizojawekinubaso.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/the_alienist_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/0620/5857/files/catalogo_ikea_2020_usa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3279/5541/files/aarhus_city_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/active_listening_definition.pdf
    • https://cdn.shopify.com/s/files/1/0429/3869/5846/files/ledadewozowebirakujapov.pdf
    • https://cdn.shopify.com/s/files/1/0432/5762/6792/files/48011303206.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/nurizititevefi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/kiseme.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9467339244.pdf
    • https://cdn.shopify.com/s/files/1/0429/1615/1455/files/rimedumevitog.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/33248177188.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083b0.bin
0f1213412e79dd81604ea89cb3035e99c7ef972024726dbfc1de1943dc93491e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83B0 5544 bytes
font_01_sfnt_off00009669.bin
2f9bbb97c37c336fe3b4725849b38fcab4fe38ef79ef61b6b249e8712283a98f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9669 10872 bytes
font_02_sfnt_off0000bb69.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB69 4324 bytes

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