Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c6b6a083473f879…

MALICIOUS

PDF

62.5 KB Created: 2020-08-23 06:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c39ad87c11add50a9d05808e7fb2a54 SHA-1: f992b712290acac0d326181d173a06175c457e3d SHA-256: 0c6b6a083473f879c84bacb1c5d51d47322189fc2772e40dee655e5390f5d88e
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of embedded links, suggesting a link farm or phishing attempt. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to harmful sites.

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=homeworld+deserts+of+kharak+unit+guide
    • http://pawabir.sarahann-photography.com/uploads/1/3/2/7/132712116/7701936.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0448/2147/9584/files/beautiful_eyes_images_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/xurex.pdf
    • https://cdn.shopify.com/s/files/1/0433/9492/4694/files/54107586983.pdf
    • https://cdn.shopify.com/s/files/1/0434/2474/3591/files/circle_k_job_application.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7249/files/wovivosugadufagipujubipaz.pdf
    • https://cdn.shopify.com/s/files/1/0436/9488/2984/files/27836975714.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0514/files/nalosatowumuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2667/files/27771797776.pdf
    • https://cdn.shopify.com/s/files/1/0430/5377/7047/files/zugubepipok.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/formasi_cpns_kab_bandung_barat.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/47711203920.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_off0000a8d3.bin
ba416aa6468eeeaeb715bff25a8bcc859e617700962110ce9a2f105e1a51a2ac
pdf-font-stream PDF embedded font (sfnt) at offset 0xA8D3 5320 bytes
font_01_sfnt_off0000bacf.bin
f68117f0d4f0d54cbdb2a7e56282705e35fbf6ca48329fe4fdb49c39d682d16e
pdf-font-stream PDF embedded font (sfnt) at offset 0xBACF 10648 bytes
font_02_sfnt_off0000deae.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAE 4324 bytes