Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69eac2c4d4b36a5…

MALICIOUS

PDF

44.8 KB Created: 2020-09-18 07:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf8a086d0c260334aeb2589c7b973b8f SHA-1: a137244628c404d96aa1276ed070c67e960b3320 SHA-256: c69eac2c4d4b36a5d6e7590900c8bc089c6e7f6028cc705e0a32b295c5ced5fa
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to suspicious domains and are indicative of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are likely intended to lead the user to malicious content or further infection vectors.

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/wix?keyword=style+manual+of+the+american+psychological+association
    • http://xuwenu.teahillsfarms.com/uploads/1/3/1/0/131070374/9c5d84649956e.pdf
    • http://files.shsdrama.org/uploads/1/3/0/8/130874594/gusegukisejadu.pdf
    • http://xoduxixix.roma57.com/uploads/1/3/0/8/130814011/e80884220.pdf
    • http://bavelo.crowleyfirstumc.org/uploads/1/3/0/7/130739059/65fc132.pdf
    • http://files.medinamoving.com/uploads/1/3/1/4/131409017/nexibol-fexixufudez-tupuvaxo.pdf
    • http://luwotaz.dunaecrenwelge.com/uploads/1/3/1/4/131482851/6587053.pdf
    • http://files.christyintheclassroom.org/uploads/1/3/1/3/131398333/vazuko.pdf
    • https://cdn.shopify.com/s/files/1/0438/0088/7457/files/c_l_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0447/1059/2668/files/68713737051.pdf
    • https://cdn.shopify.com/s/files/1/0436/1597/7630/files/jack_lalanne_power_juicer_express_manual.pdf
    • https://2f0b783d-6da3-432a-b486-2de67eac7695.filesusr.com/ugd/3254bf_ead1ddc4336b4e2fab7091beba393b37.pdf?index=true
    • https://bacde671-fa54-4ef1-b540-a33f718d24fa.filesusr.com/ugd/b13fd1_33d43a13d56143ee8d59846b1fc0817f.pdf?index=true
    • https://ec4004d5-5926-4ef1-919b-4371ecbda36e.filesusr.com/ugd/6f58fb_82de5e70f23846dd85add06361a05599.pdf?index=true
    • https://97536c4c-77f7-4fa2-a25c-087a411fb5b7.filesusr.com/ugd/b81754_10cf512afc42436fbaca9d0a45750ff7.pdf?index=true
    • 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_off0000701a.bin
092753c234822554960a14654e25f188d365607dea6a3b4d2eece9392fd21d9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x701A 5632 bytes
font_01_sfnt_off00008321.bin
551c2a56b547d6250a573cbaf90447187a8b6ed17f3c6543fe100431eae4135d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8321 10184 bytes