Malicious PDF — malware analysis report

Static analysis result for SHA-256 b07c56079c8fab66…

MALICIOUS

PDF

49.2 KB Created: 2020-08-10 15:39:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acd3f2d6df43cdc6cd82868d0286337f SHA-1: 8f55c75f4f0b5fe9772717865d956808daad0561 SHA-256: b07c56079c8fab66e279f79ed5050ef4690c4c15fbb2d46b83c82c5b2eecc7ed
150 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.ru). The document body, though heavily obfuscated, contains the same lure text as the malicious URL, suggesting a phishing attempt. The ML classifier also flagged this PDF with high confidence. The primary attack pattern involves luring the user to click a malicious link disguised as a book download.

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=introducing+phonetics+and+phonology+3rd+edition+pdf
    • http://files.musicgifts4u.com/uploads/1/3/2/7/132712326/2ca946.pdf
    • http://dalan.ckylibrary.org/uploads/1/3/2/3/132303382/4189514bdb0411b.pdf
    • http://files.organizingwithemily.com/uploads/1/3/2/3/132302998/c0d0c47aa9.pdf
    • http://pobiru.cottonshed.co.uk/uploads/1/3/0/7/130739777/wawetamanuxinijuxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6731/files/zuzus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73633131036.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0157/files/52447555837.pdf
    • https://cdn.shopify.com/s/files/1/0432/8210/4478/files/xegib.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.pdf
    • https://cdn.shopify.com/s/files/1/0440/5886/9910/files/nurejavutovonamavuxom.pdf
    • https://cdn.shopify.com/s/files/1/0438/6213/0848/files/17458594819.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/jquery_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/7542/0835/files/91155781862.pdf
    • https://cdn.shopify.com/s/files/1/0432/9000/1572/files/refegafiko.pdf
    • https://cdn.shopify.com/s/files/1/0428/7807/5036/files/kikofuge.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/72859388806.pdf
    • https://cdn.shopify.com/s/files/1/0448/2839/3634/files/thinking_out_loud_chords_piano.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000658e.bin
9889c9fcebb45910f416528b74642f6959dcb68d3e491e3bc20433c876069a93
pdf-font-stream PDF embedded font (sfnt) at offset 0x658E 7548 bytes
font_01_sfnt_off00007e86.bin
704e9e59d779b3af26547b8d8e375993da1e56a18cd3636847e20461948298ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E86 5620 bytes
font_02_sfnt_off000091a8.bin
490e345c30732f9eb0a83fd8df6382889f510ab2c30205dffef49d2cc3f5fcff
pdf-font-stream PDF embedded font (sfnt) at offset 0x91A8 10124 bytes