Malicious PDF — malware analysis report

Static analysis result for SHA-256 e08d0c446c61fa21…

MALICIOUS

PDF

34.0 KB Created: 2020-09-08 17:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd332724c6a46e3eff7ae67d5ac1bf48 SHA-1: 1fc9c754a2e4ee3a62ae4b3db92b5677e8127793 SHA-256: e08d0c446c61fa21a469bb23da14da676e5925991b9c05842fdd5cb11a9dd818
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a 'college campus tour worksheet' and the malicious URL. The PDF_SEO_LINK_FARM heuristic suggests the PDF is part of a larger link farm designed to distribute 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.me/wix?keyword=college+campus+tour+worksheet
    • https://static.usrfiles.com/ugd/d4da64_c6d6fd04cffd499fa22add7ad9f33bec.pdf
    • https://static.usrfiles.com/ugd/05e3ad_d9661968b7e640d59bb19d5d5be95334.pdf
    • https://static.usrfiles.com/ugd/3649d2_63d917d7b26648d3be2401543c12266d.pdf
    • https://static.usrfiles.com/ugd/c63bf9_ce99322e7bf149c39870a7f04afdc50c.pdf
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/causes_of_cavitation_in_pumps.pdf
    • https://cdn.shopify.com/s/files/1/0446/9764/9306/files/merge_sort_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0433/8994/3975/files/pimadanagomokinabodutut.pdf
    • https://cdn.shopify.com/s/files/1/0434/4745/1798/files/deled_assignment_cover_page_design_free.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/caso_clinico_cirrose_hepatica.pdf
    • https://static.usrfiles.com/ugd/b8c837_0293ed1d42d642e9af2d33260aeb818b.pdf
    • https://static.usrfiles.com/ugd/9e14ca_9907bd9c46d84d969c6cb4c5c8399c55.pdf
    • https://static.usrfiles.com/ugd/c1de29_b780602842f742a690bda0b1414a6100.pdf
    • https://static.usrfiles.com/ugd/696117_85ab488168de4b6899d0e1a397c94304.pdf
    • https://static.usrfiles.com/ugd/948cea_98936a04ecfd4ee5baa9a5db397fd475.pdf
    • https://cdn.shopify.com/s/files/1/0435/4893/4295/files/ffxiv_leveling_guide_1-_50.pdf
    • https://cdn.shopify.com/s/files/1/0430/7861/5189/files/active_directory_security_group_membership_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/accuweather_westminster_md.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004921.bin
6f75cf27a46084e0468fe08d03a55ee7d2a8f880d80ca357d84d47f338c12b77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4921 5408 bytes
font_01_sfnt_off00005b69.bin
d2f38d38fee2b78d668162f8f090c8c19f9a2792d9f87d6fcc170bdf1a0b094b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B69 9388 bytes

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