Malicious PDF — malware analysis report

Static analysis result for SHA-256 68013923dd96b5c1…

MALICIOUS

PDF

85.7 KB Created: 2020-09-04 21:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acd74bb883fab3cb46f0ac1370260ad1 SHA-1: ba6d807bdae5e1906f87388082dbea7f7f8f088e SHA-256: 68013923dd96b5c12b1ba534525502bff10da8a704cb174562b200875152bc3c
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.link/pify?keyword=what+is+behaviorism+theory+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the primary intent is to trick the user into visiting this malicious link. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=what+is+behaviorism+theory+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/8e1900_ee859ac4bb0043aaa04b632db7e20b05.pdf
    • https://static.usrfiles.com/ugd/4dd980_3ab7e8d7d6b045b3a206585af5b8ca86.pdf
    • https://static.usrfiles.com/ugd/7e6083_5767510e3327404d804b458aa290eaa0.pdf
    • https://static.usrfiles.com/ugd/9e14ca_9f0847d15d3441e2bcbce88ebecc8e27.pdf
    • https://cdn.shopify.com/s/files/1/0435/7170/8065/files/2156832021.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2520/files/metelarazirulozo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/vutafumufigo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7258/4870/files/laxivesabavakixumipu.pdf
    • https://cdn.shopify.com/s/files/1/0456/8544/0671/files/dixikimek.pdf
    • https://static.usrfiles.com/ugd/b8c837_253cc0ff78e042fdb1ed281ec2f3713b.pdf
    • https://static.usrfiles.com/ugd/30e015_75156aff064f4477b43425216c19581b.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b7fd98a56984821900bff5466b75b4a.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_off000105a4.bin
447b0c990673f04ab9b0b7a60a354377fc22e8050eb73f77c208703f60a4793a
pdf-font-stream PDF embedded font (sfnt) at offset 0x105A4 5248 bytes
font_01_sfnt_off0001178e.bin
1de45b3c64e361161b435a423ea81c6c1266d2d4fa4929b5367351defad83096
pdf-font-stream PDF embedded font (sfnt) at offset 0x1178E 10584 bytes
font_02_sfnt_off00013bd2.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD2 4324 bytes