Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c3912860253719f…

MALICIOUS

PDF

38.3 KB Created: 2020-08-15 03:41:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d99f17eef2dc4c24883cbd20724f3a7 SHA-1: 690647cfb2366dd84a3a99d44ba692cb814863fb SHA-256: 7c3912860253719f5a41f5da6f83fe7b276790c64badeba73e7388adbbbbbaf7
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO poisoning attempt. One prominent link, 'https://ttraff.ru/pify?keyword=lorna+jane+size+guide', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Lorna jane size guide' and the malicious URL, indicating a lure to redirect users to malicious infrastructure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.ru/pify?keyword=lorna+jane+size+guide
    • http://files.literaturehouse910.com/uploads/1/3/2/7/132740930/lufomonu.pdf
    • http://fugonejus.albacomposition.com/uploads/1/3/1/6/131637136/2724058.pdf
    • http://butal.matildameadescubittdesign.net/uploads/1/3/1/3/131384169/lufazoda.pdf
    • http://zalidifit.showyouwhatsreal.com/uploads/1/3/1/8/131857445/fopasago.pdf
    • http://bakonowo.mrksmathhelp.com/uploads/1/3/1/4/131453495/08e72b9f103a777.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/0762/2817/files/wurur.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/xenowowisikekonupuxokaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/ielts_vocabulary_words.pdf
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/alimentacion_enteral_por_gastrostomia_y_yeyunostomia.pdf
    • https://cdn.shopify.com/s/files/1/0433/7179/0494/files/difference_between_double_and_float.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nubizasijimowedemo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/19353664614.pdf
    • https://cdn.shopify.com/s/files/1/0429/2214/8003/files/one_day_in_the_life_of_ivan_denisovich_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/nopalunawikosomuneru.pdf
    • https://cdn.shopify.com/s/files/1/0432/0722/9597/files/52893047164.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/guxefolug.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_off00004c37.bin
2fb79995abc696f0ffd65cd0af476f5d3965a454a07bef9b7e6f4ce912d81897		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C37 4828 bytes
font_01_sfnt_off00005cad.bin
52bcaa34d3dca49b7cc011bd5c827a6525a9d977206192d3c55b210bd838ff32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAD 9876 bytes
font_02_sfnt_off00007e82.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E82 4324 bytes

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