Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b6111214e33abe7…

MALICIOUS

PDF

82.2 KB Created: 2020-08-13 07:22:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18e321ec7d165ce3dab6d923b12dc5d0 SHA-1: ee3392f996e0a0c47d5495bfa2a573cb3e2396e1 SHA-256: 5b6111214e33abe7f941cb7d248f1ba6e813f229ce52a70773caa83d03acdd55
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a link to known malicious redirector infrastructure. Another heuristic indicates a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The presence of a password-protected archive lure heuristic further supports a malicious intent, likely to bypass gateway scanning. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=pdf+aminoacidos+y+proteinas
    • http://jujop.shcgiftshopgrabngo.com/uploads/1/3/2/3/132303382/9974225.pdf
    • http://files.grdroofremoval.com/uploads/1/3/0/7/130739835/2878304.pdf
    • http://files.teensfaithcabot.org/uploads/1/3/2/3/132303131/lelofazavefovow_xuxoxu_tutixupatemus.pdf
    • http://files.minilivestock.com/uploads/1/3/2/7/132740415/38a223c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2363/8426/files/16137311424.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/56323261574.pdf
    • https://cdn.shopify.com/s/files/1/0438/5810/0384/files/duzomexelopuzex.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4917/files/funky_town_video.pdf
    • https://cdn.shopify.com/s/files/1/0430/5167/9898/files/wind_waker_ost.pdf
    • https://cdn.shopify.com/s/files/1/0437/4459/2021/files/alucinaciones_olfativas.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/sufijifelif.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/baxomopuwigodasegenuzez.pdf
    • https://cdn.shopify.com/s/files/1/0429/5504/7068/files/miridexogeguji.pdf
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/xagaxifopekuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9074/7295/files/23681242872.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/78900329870.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c85b.bin
0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC85B 6744 bytes
font_01_sfnt_off0000d911.bin
9bdc3af6ab14e90d2b25f5fd3af9e15f091efd273cea359a65dfb6e0da362349		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD911 3636 bytes
font_02_sfnt_off0000e5fb.bin
6cb6d47752e40c7abfebc17b8ed3568d8c930605a21710a5b0e3b26380ff4014		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FB 5372 bytes
font_03_sfnt_off0000f835.bin
c0118887fd7a76ad333196c28534630abf29833db3f4c01855c2903b2a6a65d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF835 12788 bytes
font_04_sfnt_off000121db.bin
54de05b9b0659ddf0df3e569ba82e0cbb066a75f00d487a9755214e99e681d09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121DB 16592 bytes

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