Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d2b2376cd39221…

MALICIOUS

PDF

51.8 KB Created: 2020-08-25 16:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4093cffe94d5bda98b5d97525764b41a SHA-1: b7e8aa296a83f4cea4fd49de856699d9b8d7b264 SHA-256: 62d2b2376cd392215a938b7ddc0458c27aaf6e4a837123d81502b756333ebb36
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, contains the same URL. The presence of numerous external links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious intent to redirect users to potentially harmful content.

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.com/pify?keyword=ambedkar+song++tamil+video
    • http://files.cccdwy.net/uploads/1/3/1/4/131408798/zojesepakukux_fisesaza_bifodip_movofavipisa.pdf
    • http://biwud.dorij.com/uploads/1/3/2/7/132710712/2165320.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0432/7804/1244/files/35582465345.pdf
    • https://cdn.shopify.com/s/files/1/0435/8986/1535/files/busqueda_de_empleo_por_internet.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/bosupunidijugise.pdf
    • https://cdn.shopify.com/s/files/1/0437/2335/8358/files/70281009671.pdf
    • https://cdn.shopify.com/s/files/1/0457/9518/0710/files/sopis.pdf
    • https://cdn.shopify.com/s/files/1/0441/3734/9272/files/dojaxisoduxigelolom.pdf
    • https://cdn.shopify.com/s/files/1/0432/6536/0034/files/cuales_son_los_antibioticos_de_amplio_espectro.pdf
    • https://cdn.shopify.com/s/files/1/0439/2953/4632/files/renoviwi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6778/2821/files/83078384936.pdf
    • https://cdn.shopify.com/s/files/1/0451/3647/8361/files/class_11_ncert_biology_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0443/0325/3660/files/20082043049.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006475.bin
4fd68b15940aa7b0ace7699e1708be5e155364f895a3c0f0625d566f30e76143		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6475 5400 bytes
font_01_sfnt_off000076b9.bin
15c4aa5e764274219f3131033a3aca33665e9e2fa70fb6c0d9809358d40d5306		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B9 5244 bytes
font_02_sfnt_off00008867.bin
5727de6198c829bf331d70fb42a3022ce76ad560d68831868a8abad31706d42b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8867 13764 bytes
font_03_sfnt_off0000b4b6.bin
276c687d07a1bd5c0bbe018ad29d801d84c9099d75bdb6967fd6e1dca964a06c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4B6 3308 bytes

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