Malicious PDF — malware analysis report

Static analysis result for SHA-256 36f19c2002194c3b…

MALICIOUS

PDF

37.2 KB Created: 2020-08-08 10:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1e7bb3647eacf1b9f5e3b18cf9ac68d SHA-1: 7787b02888ba48b4b466a2f059d71a94d4de5ef8 SHA-256: 36f19c2002194c3bb25b4efe87641795c24455a83bdd4f0db650139ec71f756b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary malicious redirector URL embedded in the document body. The ML classifier also strongly indicated maliciousness. The document body text and embedded links suggest a lure related to academic writing, likely to trick users into visiting the malicious URL.

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.com/pify?keyword=crack+ielts+in+a+flash+task+1+academic+writing+pdf
    • http://files.halcyonimages.com.au/uploads/1/3/1/4/131452977/zuvorujunimavux.pdf
    • http://files.onpointltd.com/uploads/1/3/1/3/131384400/5405630.pdf
    • http://files.stillpointatbeckside.com/uploads/1/3/1/6/131606011/wefugijux-zulapakilojidu.pdf
    • http://files.advantageauburn.com/uploads/1/3/1/4/131407164/b674e8243a69.pdf
    • http://files.edgeglobalsupply.com/uploads/1/3/0/7/130775249/tulugobobixab_netoputugafafa_tetab.pdf
    • https://cdn.shopify.com/s/files/1/0438/3657/1805/files/12561717543.pdf
    • https://cdn.shopify.com/s/files/1/0431/9376/1941/files/19268714972.pdf
    • https://cdn.shopify.com/s/files/1/0435/2566/9028/files/guxemidilewukozidosal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4952854333.pdf
    • https://cdn.shopify.com/s/files/1/0431/8648/7455/files/84877572528.pdf
    • https://cdn.shopify.com/s/files/1/0432/4936/9252/files/50252124065.pdf
    • https://cdn.shopify.com/s/files/1/0434/3939/0872/files/comparison_between_dna_and_rna.pdf
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/pazesedavujiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7707/4086/files/xujiwilaxosefivaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/4486/4149/files/learn_french_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/fadonopawiwew.pdf
    • https://cdn.shopify.com/s/files/1/0430/6681/8721/files/64988938754.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005288.bin
6b4ddaeca1fd8b6e542269cff86c8acb0f3d87712bd031c46b821a4359b441ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5288 5680 bytes
font_01_sfnt_off000065c9.bin
8109f7b0450fedc5c09440a36c7283bb671ab3914bcf6d23b8ece16e0864abf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C9 9912 bytes

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