Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4ead2b937bff2a…

MALICIOUS

PDF

46.5 KB Created: 2020-08-06 11:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc4eba22790ec7a8586da3c37982cfe6 SHA-1: a3eb53a9c64945f0e17d497a8986fd289bb1ac8d SHA-256: 0d4ead2b937bff2a1c8e2b7ecb3f4fa33892bb63c3ac6b5876652beb10db3734
154 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which are hosted on Shopify and appear to be part of a link farm. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=bahrain+economic+outlook+2020+pdf'. This suggests the document is designed to lead users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly indicate malicious intent.

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=bahrain+economic+outlook+2020+pdf
    • http://files.tswb-apa.net/uploads/1/3/1/6/131636654/9585090.pdf
    • http://files.julescritchinson.com/uploads/1/3/2/6/132681556/4994332.pdf
    • http://files.tubietsai.com/uploads/1/3/1/8/131871951/4755292.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/didelukuwiviketeduke.pdf
    • https://cdn.shopify.com/s/files/1/0428/5608/7708/files/9782062975.pdf
    • https://cdn.shopify.com/s/files/1/0430/0816/3993/files/45830135713.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/gadisasejofokigedek.pdf
    • https://cdn.shopify.com/s/files/1/0430/8022/0826/files/ordeal_by_cheque.pdf
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/2608314516.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/knight_rider_heroes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rabilividobakomitunaxizug.pdf
    • https://cdn.shopify.com/s/files/1/0429/7873/8335/files/fonowidewixavuri.pdf
    • https://cdn.shopify.com/s/files/1/0433/6232/0536/files/mifirolunomivig.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/pumebafideza.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/wcf_test_client_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/23578649200.pdf
    • https://cdn.shopify.com/s/files/1/0429/4092/4063/files/how_to_rename_a_file_in_linux.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_off00006861.bin
a6d1f5514625126599f74cef9e66e4c300c23d3928bdabe4f54fd6f9e9a525bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6861 5484 bytes
font_01_sfnt_off00007ad5.bin
efa4b85a02f0ee422cc3a4986947ab2c2161598770d9248ae9eca044dc286fd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD5 10568 bytes
font_02_sfnt_off00009ef1.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EF1 4324 bytes

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