Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df95a9085622638…

MALICIOUS

PDF

49.8 KB Created: 2020-08-22 02:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3d59fda199491a5f06d49243d072dee SHA-1: a70cc1e104251f64d681c01b0498bb6816f4aa8e SHA-256: 9df95a9085622638c192cd0bad8c07b98dfcf9e13802eb2774856696f3ff75ae
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

This PDF document contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.cc/pify?keyword=alphabetical+order+animals+worksheet'. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to phishing sites or download further malware. The document body itself is heavily obfuscated and contains what appears to be junk data, further suggesting it's a container for malicious links rather than legitimate 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.cc/pify?keyword=alphabetical+order+animals+worksheet
    • http://files.lifeboxusa.org/uploads/1/3/2/6/132681783/xewogen.pdf
    • http://zapiwu.utahproaudio.com/uploads/1/3/2/6/132682076/rinosanudax.pdf
    • http://kubibagik.bottilaw.com/uploads/1/3/2/7/132740249/ridemunebis_nogomufezizelar_wiseza_xaxuzuzegivowa.pdf
    • http://files.justinlambmusic.com/uploads/1/3/0/7/130775049/radufitufubagux.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4551/files/fipepepopivaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7728/files/kovudiri.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/89195415103.pdf
    • https://cdn.shopify.com/s/files/1/0459/7455/2743/files/new_episodes_girlfriends_guide_to_divorce.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/convert_scanned_to_word_free_download_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0438/9657/0024/files/possessive_pronouns_exercises_1_eso.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6086/files/18575348720.pdf
    • https://cdn.shopify.com/s/files/1/0433/5435/7910/files/digital_photography_ebooks_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/4021/8015/files/87020528642.pdf
    • https://cdn.shopify.com/s/files/1/0464/7868/8408/files/dish_tv_guide_listings.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_off00007736.bin
c00ce69a80db978d6cc924728d082d0978c62aac9a519a83279f3776525c1a1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7736 5388 bytes
font_01_sfnt_off0000894f.bin
922a47ce0517f95ae9aba76568d9ede2d5bc38b579763fa148bc0f0a33cadf4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x894F 10240 bytes
font_02_sfnt_off0000ac6c.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC6C 4324 bytes

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