Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd4dc7f2f8062d7…

MALICIOUS

PDF

43.8 KB Created: 2020-08-25 15:29:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0aa60488ca5d08537adf1cc5e2b0220 SHA-1: 6da5da5245f65ac5ced92b08dcc3c6655eafd9f9 SHA-256: 5fd4dc7f2f8062d7522fb450b91eaf700597c956d0f8706251465997ee735103
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm, with one URL pointing to a known malicious redirector and others to benign-looking PDFs. This suggests an attempt to lure users to malicious infrastructure or potentially less reputable content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a 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.cc/pify?keyword=ambassadors+of+christ+kwetu+pazuri+song
    • http://gosaj.tranquilkneadz.com/uploads/1/3/1/4/131453215/7812410.pdf
    • http://bugog.culinaryrogue.com/uploads/1/3/1/4/131453501/2998717.pdf
    • http://files.queencityfrenchies.com/uploads/1/3/2/7/132740564/7568001.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0463/3044/5981/files/bullying_and_harassment_policy_template_bc.pdf
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/metformina_500_mg_precio_benavides.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/tafelu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8702/0703/files/1393306467.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/vocabulaire_des_animaux_en_franais.pdf
    • https://cdn.shopify.com/s/files/1/0428/6971/9196/files/wilawiba.pdf
    • https://cdn.shopify.com/s/files/1/0427/9782/6207/files/48872050711.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6379/files/81528668836.pdf
    • https://cdn.shopify.com/s/files/1/0429/7805/0201/files/gitonodovetazo.pdf
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/kiwemenuroxifazipasoxo.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_off000055b7.bin
81669b0896622fc6a10a30125142162c6f55c0fadf50891aecad7904180ccb96
pdf-font-stream PDF embedded font (sfnt) at offset 0x55B7 5752 bytes
font_01_sfnt_off00006937.bin
e75761f528c5e7c22c17aadfcc60eda0dcff8455e350f9c210ef5f3a90d56465
pdf-font-stream PDF embedded font (sfnt) at offset 0x6937 12904 bytes
font_02_sfnt_off00009243.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9243 4324 bytes