Malicious PDF — malware analysis report

Static analysis result for SHA-256 3644922815b74119…

MALICIOUS

PDF

53.4 KB Created: 2020-08-25 00:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b95bc4f003813a4196b4f30fb9fbd634 SHA-1: 43c1fb0ffa0e930d25ec61a413d5990e64799237 SHA-256: 3644922815b74119e6b581aec67001e2b32384672e0e652ae475b72e2ad7680a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=anemia+treatment+guidelines+nhs'. This URL is presented within the document body, suggesting a social engineering lure. The presence of a PDF link farm heuristic further indicates malicious intent to distribute links. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=anemia+treatment+guidelines+nhs
    • http://files.michellebrothers.com/uploads/1/3/1/4/131453124/vugodom_wijogibudogu_zofijubadosez.pdf
    • http://files.localopal.org/uploads/1/3/2/7/132712099/gamogutu.pdf
    • http://gopegolez.naturallyroyal.net/uploads/1/3/2/6/132681411/6411855.pdf
    • http://files.danny-lim.net/uploads/1/3/2/7/132740685/favitaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/present_tense_past_tense_future_tense_examples.pdf
    • https://cdn.shopify.com/s/files/1/0434/1045/6726/files/cathy_o_brien_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/dokajafomomapulonalasob.pdf
    • https://cdn.shopify.com/s/files/1/0429/2126/3271/files/wibekawasozerojenijaguwus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38746106010.pdf
    • https://cdn.shopify.com/s/files/1/0430/9683/4212/files/nufelefitujuruzew.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/10850440744.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6575/files/dowowabivumaxowutagadalak.pdf
    • https://cdn.shopify.com/s/files/1/0440/6480/0918/files/95175438916.pdf
    • https://cdn.shopify.com/s/files/1/0435/5470/1463/files/gcse_biology_classification_worksheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008057.bin
9e362d997615e89d242988678b9a8e231ac457ee3c3d9781f73798ef6d78865a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8057 5000 bytes
font_01_sfnt_off00009111.bin
99fb8987b9880ef5fc35dc97d7d735942ffadf17d6c7976894713d9fb8063fb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9111 12868 bytes
font_02_sfnt_off0000ba99.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA99 4324 bytes

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