Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1cff0730da07c45…

MALICIOUS

PDF

61.4 KB Created: 2020-08-07 22:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01518f2580b4bd6822008a00876d6f5c SHA-1: 72e6dd18a1e8cc9ceb84f58e3418b8f293a70004 SHA-256: a1cff0730da07c453db0da1c705717eecb64569699a0601469a2edac7a232dec
150 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a reference to the malicious URL. This suggests the primary goal is to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

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.ru/pify?keyword=ballpen+drawing+pdf
    • http://files.ecabalquinto.com/uploads/1/3/0/7/130739713/duxenu.pdf
    • http://files.mikeflattdesign.com/uploads/1/3/0/7/130776462/7be355f8b5a2.pdf
    • http://files.mobiledetailinglasvegas.com/uploads/1/3/0/9/130968921/cd3bd1.pdf
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/fakofuromilos.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6070/files/typewriter_font_tattoo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/gomuwefalerufagup.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/waterimiwujinabumojep.pdf
    • https://cdn.shopify.com/s/files/1/0434/5774/0967/files/adjective_modifiers.pdf
    • https://cdn.shopify.com/s/files/1/0447/5971/1898/files/climates_of_tamriel_sse.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/mosip.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/art_commission_template.pdf
    • https://cdn.shopify.com/s/files/1/0438/1884/4322/files/28641210157.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/gululefopatire.pdf
    • https://cdn.shopify.com/s/files/1/0431/7370/7925/files/caesalpinia_coriaria.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_off0000b2ea.bin
0a57a3e5d43da40575d11287bda62e90c5b130e329634c9159a6f1e0cec2ca47		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2EA 5172 bytes
font_01_sfnt_off0000c4ac.bin
b4defe02e018197084102ec553331b68843d24c867b1193110080c105b6db58a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AC 10496 bytes

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