Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f7b2113bebdb3a…

MALICIOUS

PDF

42.2 KB Created: 2020-08-14 19:40:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 279cb70474c2d87621a32824803cdd1b SHA-1: b79aafff0ab5fda02945734282879c11f88f3213 SHA-256: 46f7b2113bebdb3a21f475b0d5f67a78af7c30cdd3e0386ee6400753547a631f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the redirector. This suggests a phishing or scam attempt, likely using the 'capstone project presentation guidelines' as a lure to encourage clicks on the malicious link. No scripts were extracted, limiting the analysis of further execution chains.

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=capstone+project+presentation+guidelines
    • http://files.composethestory.co/uploads/1/3/0/9/130969090/nitoxi-dawarumafix.pdf
    • http://files.sarahsaesthetics.com/uploads/1/3/0/9/130969370/vinizu-nozibat-jukitawufoxene-gamifug.pdf
    • http://lolag.porncolection.com/uploads/1/3/2/6/132682697/0a297044.pdf
    • http://files.investinyoursole.com/uploads/1/3/1/1/131164452/xemib.pdf
    • http://files.whatsthepointministries.com/uploads/1/3/2/6/132682171/9182969.pdf
    • https://cdn.shopify.com/s/files/1/0440/2737/9877/files/87460821159.pdf
    • https://cdn.shopify.com/s/files/1/0432/3904/7336/files/tozugugategutejutigixewat.pdf
    • https://cdn.shopify.com/s/files/1/0434/1497/8718/files/las_crceles_que_elegimos.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/fourier_series_formula_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/jisetijuku.pdf
    • https://cdn.shopify.com/s/files/1/0434/2448/1431/files/bipolar_junction_transistor_formulas.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/lavix.pdf
    • https://cdn.shopify.com/s/files/1/0431/6577/8080/files/past_simple_irregular_verbs_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0790/0835/files/48527622673.pdf
    • https://cdn.shopify.com/s/files/1/0428/1024/5279/files/71711231577.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/53443844758.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/friendship_story.pdf
    • https://cdn.shopify.com/s/files/1/0432/6732/6112/files/vavavuwiki.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_off00006823.bin
3cd8fde231e6dbb8283b96a6456a6561fd79f0aed193fa5982bba3ad320f8a5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6823 5224 bytes
font_01_sfnt_off000079f1.bin
bf9c1bd4cfa3fd3e0b8421f6e1c5da55542a312022e13f5ce050a42ce3cab4e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F1 9992 bytes

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