Malicious PDF — malware analysis report

Static analysis result for SHA-256 09bb1f3d96abf7ce…

MALICIOUS

PDF

46.5 KB Created: 2020-08-22 15:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f2614c3184be85c8b4a99a8ff7bdcbf SHA-1: c198c808f60c10faa71136bfa426658df51af43f SHA-256: 09bb1f3d96abf7ce576eb67ca17819f6b8d18377994652d371a851db229589a1
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of this malicious infrastructure. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful 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.cc/pify?keyword=splatoon+bamboozler+guide
    • http://deluxu.taejulee.com/uploads/1/3/0/7/130738850/330495.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/ladaraxawilom.pdf
    • https://cdn.shopify.com/s/files/1/0435/5493/0839/files/a_day_without_rain_enya_album.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5568/files/kutejo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5744/files/78621702919.pdf
    • https://cdn.shopify.com/s/files/1/0431/6440/1818/files/intracranial_pressure_monitoring_market_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/26163071784.pdf
    • https://cdn.shopify.com/s/files/1/0436/5520/0918/files/neduluwewotenitifasiz.pdf
    • https://cdn.shopify.com/s/files/1/0440/6237/6088/files/gupirutodotevipowuko.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/mazuw.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_off000068e6.bin
acee341856eb9015326388efabed7598cf258539e9af4be23cd74b665e86600d
pdf-font-stream PDF embedded font (sfnt) at offset 0x68E6 4216 bytes
font_01_sfnt_off000077c3.bin
62d77f02a0b6469db3b6c577c8faa335d01bc2f0854162d4807f382c2572e71d
pdf-font-stream PDF embedded font (sfnt) at offset 0x77C3 5392 bytes
font_02_sfnt_off00008a03.bin
edd0f5f9782f0200bd65c4e85f35d3dd13459a86a3d063469dc50c5253063b56
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A03 10220 bytes