Malicious PDF — malware analysis report

Static analysis result for SHA-256 036964904c182c31…

MALICIOUS

PDF

48.1 KB Created: 2020-08-20 04:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db64ce4ffd4657610069ae59e7c522a9 SHA-1: ddb874203657f6a0b6d28cb8d53912f3e62dad03 SHA-256: 036964904c182c31bbd879ebb24d3f43387ee987a64b04b1fe3e6485b500dad2
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to malicious infrastructure, indicating a phishing or scam attempt. The embedded URL `https://ttraff.cc/pify?keyword=life+cycle+of+butterfly+worksheet+for+kindergarten` is a primary indicator of malicious intent, likely serving as a lure to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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=life+cycle+of+butterfly+worksheet+for+kindergarten
    • http://files.baarleproeft.com/uploads/1/3/1/4/131453526/jogotuwaxuxud_zuxunosafolado_jojiku.pdf
    • http://penanan.ardentacres.com/uploads/1/3/1/0/131070036/2289482.pdf
    • http://lapideb.glenelder.com/uploads/1/3/1/4/131452958/kugiso_zuvaxipuduj.pdf
    • http://files.christkinglaw.com/uploads/1/3/0/8/130874544/pidifesatira_lesil_geragog_saxuwurimise.pdf
    • http://zogewive.brandywine.tv/uploads/1/3/1/4/131408027/a450571.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/3106/8825/files/gedorogoveviduwab.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/solucion_hipertonica_nebulizada.pdf
    • https://cdn.shopify.com/s/files/1/0429/5350/6969/files/sullivan_algebra_and_trigonometry.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/vevedabi.pdf
    • https://cdn.shopify.com/s/files/1/0438/7926/8520/files/the_kid_charlie_chaplin_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3935/files/zajinawotifexidej.pdf
    • https://cdn.shopify.com/s/files/1/0435/9503/8877/files/85800881041.pdf
    • https://cdn.shopify.com/s/files/1/0434/6055/9013/files/54224177770.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2117/files/97114638897.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_off00006883.bin
14645b61979496c05b7956f1e77a870b6c40f2748c82048fec8e48eac6003764		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6883 5504 bytes
font_01_sfnt_off00007b41.bin
f5d4d6e8abb13ee1ab3d9a106ace48b07867eb4e5eabbcf593c8ac51f00add9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B41 13144 bytes
font_02_sfnt_off0000a552.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA552 4324 bytes

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