Malicious PDF — malware analysis report

Static analysis result for SHA-256 522705f213722820…

MALICIOUS

PDF

47.3 KB Created: 2020-08-16 17:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4d387f78a01db90e9d0a6aa5ff3105b SHA-1: a381709eb128088ed930893efa1f5e7b4fd06d1d SHA-256: 522705f2137228209b5c082f60f16e3af6882e7f283afab2031ae771f386e5dd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=interculturalismo+definicion+pdf', likely leads to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector suggests a phishing or malware delivery attempt.

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=interculturalismo+definicion+pdf
    • http://files.toricoryphotography.com/uploads/1/3/1/4/131438405/zasagod-lekakume-jetisenaton.pdf
    • https://cdn.shopify.com/s/files/1/0438/3630/9666/files/arris_cm820_lights.pdf
    • https://cdn.shopify.com/s/files/1/0436/9491/5738/files/89927428760.pdf
    • https://cdn.shopify.com/s/files/1/0453/2869/5451/files/mandiri_e-_cash_apk_pure.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8298/files/werexal.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/xajiweromonirunil.pdf
    • http://files.gcheng.people.ua.edu/uploads/1/3/0/7/130775588/fulapejotarelugumon.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2776/files/60983253703.pdf
    • https://cdn.shopify.com/s/files/1/0431/4149/6986/files/wofepijewogupijepakemugik.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8306/files/11219125703.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/analytic_geometry_in_two_and_three_dimensions_chapter_8.pdf
    • https://cdn.shopify.com/s/files/1/0430/5240/0789/files/les_articulations_synoviales.pdf
    • https://cdn.shopify.com/s/files/1/0428/9455/7350/files/69058145893.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cc5.bin
97e6846b75585df3589ff2fa5446f61086702ee35e344088a5079046af8d3631
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC5 5236 bytes
font_01_sfnt_off00008e74.bin
468a6ee2fa9287babb020db01755c7a11f483c5b564543315ef5e388a3e8ff3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E74 10076 bytes