Malicious PDF — malware analysis report

Static analysis result for SHA-256 c73fab552a6bbfb6…

MALICIOUS

PDF

40.0 KB Created: 2020-08-22 03:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdbc30cccc9203be9cabe8ca145b35dd SHA-1: bcc55e1aeb84e201eb9ed70463ec7612d15257aa SHA-256: c73fab552a6bbfb66043a95867177e1dab2510cc74a7e4d29e27d97053d91185
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to 'free games app for android phone' and the malicious URL. The primary attack vector appears to be social engineering via a deceptive link, leading to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=free++games+app+for+android+phone
    • http://files.azdoodleranch.com/uploads/1/3/1/3/131380504/xomegususilenebija.pdf
    • http://liriloza.gilmorehawks.com/uploads/1/3/2/6/132695535/movapimofaw.pdf
    • http://files.cranberrycloud.com/uploads/1/3/1/4/131452778/gakab.pdf
    • https://cdn.shopify.com/s/files/1/0444/0326/1606/files/51450595581.pdf
    • https://cdn.shopify.com/s/files/1/0438/9850/3336/files/cartography_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/81796322759.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/abbyy_transformer_trial_version_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0996/5212/files/70631805649.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/2d_artist_portfolio.pdf
    • https://cdn.shopify.com/s/files/1/0447/9415/1061/files/altivar_320_programming_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/0196/0854/files/70919522769.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_off00005e34.bin
151b265133452c1a5f4e5a33f37dd4541712c6d3e7dc6d41dc779739cd8ed781		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E34 5376 bytes
font_01_sfnt_off00007059.bin
d58c356ee0ccb74745a52121dfcf5eacff42a4dfdf21482cde73f70662c71c73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7059 10300 bytes

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