Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f8db31cad63c79…

MALICIOUS

PDF

47.5 KB Created: 2020-09-07 17:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c56e9ab82683fcfc00b792c759fcd0b8 SHA-1: 85555ced924428b33d755679f106c9a528d2b457 SHA-256: 07f8db31cad63c79809ece369a59379fb0bbe8b595f39193f6e586d3653918cf
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to MLA formatting and includes the malicious URL, indicating an attempt to disguise the malicious link. The presence of numerous external PDF links also suggests a link farm, potentially for SEO manipulation or to host 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.link/wix?keyword=mla+format+book+with+one+author
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/10b11f_75340a86215840ae9fc94e28c13e1e6b.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc17681cc45544259d04b49a771b5b28.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa25e1f126944930bdbefbf180af2a56.pdf
    • https://static.usrfiles.com/ugd/111c46_515ca357ef2547a49a2088da19eff907.pdf
    • https://static.usrfiles.com/ugd/b8c837_3965226ac8f9493e9a7333be8078ceb5.pdf
    • https://static.usrfiles.com/ugd/5899d5_0154b2dea0e04b02b65bdbf5e73ac16f.pdf
    • https://static.usrfiles.com/ugd/de60da_76e98f8da0e4486c8c8b66c62623125f.pdf
    • https://static.usrfiles.com/ugd/b8c837_46097ce2206045ce97267481e2a31680.pdf
    • https://static.usrfiles.com/ugd/b8c837_12918248429a48a5a194bf0ac226cdbc.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7674/files/15806602421.pdf
    • https://cdn.shopify.com/s/files/1/0438/4374/7990/files/netflix_apk_para_pc_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0432/8574/1724/files/wedding_pack_ii_videohive_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/3709/0211/files/the_hydrosphere_and_biosphere_worksheet_answers.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_off00007d50.bin
f260dd084163614326a3950277f75074f4744b91dd8c958b67b9f777958caf00
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D50 5128 bytes
font_01_sfnt_off00008ebb.bin
bcc1680abcd767eaba3954911875c7f36e00b84882e598dc526ccf3e2c853ada
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBB 10452 bytes