Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e30865da7d426e…

MALICIOUS

PDF

56.8 KB Created: 2020-08-23 02:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f77ef4c249c62c2a4db7f37890b51f5 SHA-1: 6fa80518285a8a8860dc64ec518d65da088ad37e SHA-256: 70e30865da7d426e5bb5bee29bd4549b0cb1474ef2f33e45dba2c3762de515f4
154 Risk Score

Malware Insights

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

This PDF file contains numerous links, many of which point to a link farm designed to distribute malicious content. One prominent link, 'https://ttraff.cc/pify?keyword=hawthorns+away+ground+guide', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious infrastructure. The ML classifier 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=hawthorns+away+ground+guide
    • http://toladuz.jesstheticsskincare.com/uploads/1/3/0/8/130814328/timawijinifew_risuv_mufuluzoj.pdf
    • http://files.willowandcane.com/uploads/1/3/0/9/130970009/levizeradutigat.pdf
    • http://files.ohiothunderbasketball.com/uploads/1/3/0/7/130739616/juvinajoxeg.pdf
    • http://files.year8religionlynam.com/uploads/1/3/1/6/131606227/womuv-muzevusu-funilajopixam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7647/5290/files/american_red_cross_lifeguard_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/gojifojedas.pdf
    • https://cdn.shopify.com/s/files/1/0434/8719/9394/files/adverbial_phrases_examples.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0767/files/google_sheets_conditional_formatting_between_two_dates.pdf
    • https://cdn.shopify.com/s/files/1/0427/6187/9719/files/70714578704.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/zuzakilisikigopukobezase.pdf
    • https://cdn.shopify.com/s/files/1/0431/8425/9231/files/pengertian_apgar_score.pdf
    • https://cdn.shopify.com/s/files/1/0437/9266/2688/files/bekibajaxovanuxobes.pdf
    • https://cdn.shopify.com/s/files/1/0435/7691/8175/files/59757785154.pdf
    • https://cdn.shopify.com/s/files/1/0436/3082/1529/files/petusewufig.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1510/files/kefitove.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009889.bin
1c0aa80caf126578551350ade92d53f3ba13aa77e962396af54f130f32ec4592		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9889 5212 bytes
font_01_sfnt_off0000aa4e.bin
e4d6e2ea515c195eef61a9fd9423bc0030edb5458e9b4e7738ab2bfbcac0fb08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA4E 13776 bytes

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