Malicious PDF — malware analysis report

Static analysis result for SHA-256 66f22b1054159fee…

MALICIOUS

PDF

42.9 KB Created: 2020-09-16 03:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e90e8351e8c65ab2aef7c9a42a6ce509 SHA-1: c5906f3091a93f532a554db2c81133ee47197bd3 SHA-256: 66f22b1054159fee1fe477a1d37096ad7f3d3503b95f780047662edaf517dbf1
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with a critical heuristic identifying it as a malicious redirector link farm. The document body, though heavily obfuscated, contains a URL that matches one of the identified malicious links. This suggests the PDF is designed to redirect users to malicious infrastructure, likely for phishing or to download further malicious 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.club/pify?keyword=editor+de+presentaciones+para+pc
    • http://files.evelynblack.com/uploads/1/3/1/8/131872138/3eca4d3ca36f.pdf
    • http://guzitomup.mymollydoll.com/uploads/1/3/1/3/131398101/8215470.pdf
    • http://files.laniergsa.org/uploads/1/3/1/3/131383760/e7eedca534f.pdf
    • http://files.jeffreyburghauser.com/uploads/1/3/0/7/130776573/5457650.pdf
    • http://ritezak.ptcwyoming.com/uploads/1/3/1/6/131606289/mugogazariru.pdf
    • http://files.tristatemaxedoutwomenspac.org/uploads/1/3/1/4/131407247/6303637.pdf
    • http://files.theuniform.store/uploads/1/3/0/9/130970003/8792577.pdf
    • http://files.gbartistsassociation.com/uploads/1/3/0/7/130776728/zipelurusativuki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/fafc38_93e303203d2d4454a4e871cb64ebddd4.pdf
    • https://static.usrfiles.com/ugd/3be3a7_fc3ca77a98bd452e840b5f1bfaf8ee32.pdf
    • https://static.usrfiles.com/ugd/008e52_37aa939637154109912b78a861dbad9e.pdf
    • https://static.usrfiles.com/ugd/ce5d00_0641fa05a67d44e8aa13eb6d75e79634.pdf
    • https://cdn.shopify.com/s/files/1/0460/0899/1905/files/alibaba._com_app_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/8030/2240/files/aranmula_palliyodam_song.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_off000066c4.bin
0ab0d7c2ba35b5de781b0a8ff9d152e628b4f0072c083b1511edc40725ca64bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x66C4 4992 bytes
font_01_sfnt_off000077cf.bin
62d018340b17f020b81738c37e61368922c21fdcc3694a8121cd2ad8d88efd80
pdf-font-stream PDF embedded font (sfnt) at offset 0x77CF 11356 bytes