Malicious PDF — malware analysis report

Static analysis result for SHA-256 581a7da2eba01171…

MALICIOUS

PDF

55.4 KB Created: 2020-10-27 01:53:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d1c5b328632d1c323249bb799acb1f6 SHA-1: 5f197aea9506f949f4dbc7ac084aafcf1911f544 SHA-256: 581a7da2eba011719d078aa470cdc6dcd7f8433de799b36670e82a3a9544c2ad
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a redirector URL, which is a common tactic for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests a link farm used for SEO poisoning or traffic redirection. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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://cctraff.ru/strik?keyword=oregon+mutual+insurance+claims
    • https://zekuwatifakaxi.weebly.com/uploads/1/3/2/8/132815855/gebamiguloz.pdf
    • https://rurujopolobadez.weebly.com/uploads/1/3/4/4/134444805/dafajibe.pdf
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/1e853a82f77fdb.pdf
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/3794757.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/a0bb000b-5957-4bfb-885d-3c3c442d65f7/30462768054.pdf
    • https://uploads.strikinglycdn.com/files/248708ff-064d-470c-9fc2-9766546f57a0/61206874611.pdf
    • https://uploads.strikinglycdn.com/files/cb4bd06c-16a4-44e1-b348-bdee3a453601/64613914824.pdf
    • https://uploads.strikinglycdn.com/files/7e2d60a6-c4fd-4265-a623-a4755bab9f4a/63013199310.pdf
    • https://uploads.strikinglycdn.com/files/fda539d9-bb15-4760-84a7-d2af73a399f6/82873579905.pdf
    • https://uploads.strikinglycdn.com/files/ccd04f98-e4f6-4d4a-a474-189c1422127e/30897294656.pdf
    • https://uploads.strikinglycdn.com/files/c1176176-1628-4751-8d62-496654efdb4a/88260866937.pdf
    • https://uploads.strikinglycdn.com/files/c28932a8-a03f-4227-8e38-22747858c899/tumewinot.pdf
    • https://uploads.strikinglycdn.com/files/b4f04621-e7c9-4ad6-bc1f-2081842fa168/dataletutoj.pdf
    • https://uploads.strikinglycdn.com/files/893afe42-eced-4d2c-9e41-e38db8c54f26/91686341436.pdf
    • https://uploads.strikinglycdn.com/files/b9b70157-5254-439d-921e-d3258e8d5ebc/84237207159.pdf
    • https://uploads.strikinglycdn.com/files/d56c074d-d941-44da-8542-0a7b69defc52/dumefixinetirifutakejimon.pdf
    • https://cdn.shopify.com/s/files/1/0501/2373/5197/files/converter_arquivo_jpg_em_gratuito.pdf
    • https://cdn.shopify.com/s/files/1/0493/1911/6966/files/top_5_video_calling_apps_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0498/0156/0226/files/curly_girl_method.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_off00008c59.bin
4309296409e57c265adc9316e0cb92811916d000e1b589004172b8753aa3139c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C59 5028 bytes
font_01_sfnt_off00009d59.bin
0f7daed61d825e594c143ce606ee281e4550cbcc2f8e2642811d216ec47c4488		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D59 10984 bytes
font_02_sfnt_off0000c2a0.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A0 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.