Malicious PDF — malware analysis report

Static analysis result for SHA-256 780c3047bdef1101…

MALICIOUS

PDF

48.2 KB Created: 2020-08-21 18:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b649baba2da901deb18eab3217f1630 SHA-1: f885df651f0cd141ce4ed22fa7dc351002d0223d SHA-256: 780c3047bdef1101d1e6df5fd46794e243221fbfa53e165b66789eac7a7273aa
162 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. This suggests the document is designed to lead users to malicious sites, likely for further exploitation or phishing. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=hau+bsc+agriculture+online+form+2019
    • http://murizovov.olivialevez.com/uploads/1/3/0/9/130969465/nupiwada.pdf
    • http://fikek.douxoverdesign.com/uploads/1/3/2/3/132302868/1856062.pdf
    • http://xonodiwaf.millennialwomen.net/uploads/1/3/1/1/131164250/mejovazib.pdf
    • http://tejufini.ecardsvs.com/uploads/1/3/0/9/130969679/xojosotasupebu.pdf
    • http://sojizapux.nmsfamilycenter.org/uploads/1/3/1/3/131380845/e237a8d6e965efb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/3262/5831/files/46043509034.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8951/files/sunopatimadokumijegip.pdf
    • https://cdn.shopify.com/s/files/1/0435/6803/8049/files/29757873815.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/rimokebibeza.pdf
    • https://cdn.shopify.com/s/files/1/0438/3680/1181/files/chemistry_form_3_notes_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/0886/0065/files/cell_and_molecular_biology_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/juzopuzenafososokazulu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3175/6957/files/2015_honda_accord_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9315/6259/files/xamumiforoxok.pdf
    • https://cdn.shopify.com/s/files/1/0430/2677/6227/files/9775040964.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49726552648.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7335/files/kelley_blue_book_rv_pricing_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0304/files/78138977748.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8943/files/stop_drop_shut_em_down.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_off00006f94.bin
1a3af73e7aa30d7bbb4f849c9258d530a201b01d5ee4365bc1a16178e3bf3bfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F94 5668 bytes
font_01_sfnt_off000082be.bin
c83e7295a5523913646ea7b757c98d513e10db1ee82a99571770873dcc6a2813		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82BE 10060 bytes
font_02_sfnt_off0000a52f.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA52F 4324 bytes

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