Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54c7130a7f6b811…

MALICIOUS

PDF

45.9 KB Created: 2020-07-28 12:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a65a7984c5e98cc03cc00cdae4382b9b SHA-1: 9084573adc025cd7b84c051f6467e09c683a7816 SHA-256: d54c7130a7f6b811ed28a146a9c1a2c476490c760dd9e1f0599e204f7fb97b5f
150 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDFs, a common technique for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely used to distribute malware or conduct phishing. The document body, though heavily obfuscated, contains references to 'Advanced systemcare free 2019', suggesting a lure to download or install potentially unwanted or malicious software. The ML classifier also strongly indicated maliciousness.

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=advanced+systemcare+free++2019
    • http://files.modusmarketseurope.com/uploads/1/3/2/6/132682110/e8e44c.pdf
    • http://files.thesyncretistrealm.com/uploads/1/3/0/9/130969018/2d7d4a7e.pdf
    • http://files.thevictualbar.com/uploads/1/3/1/4/131438038/nekomopu.pdf
    • http://files.jenniferhayesstl.com/uploads/1/3/0/7/130739777/67ebab12a5a.pdf
    • http://files.greatplainsbahaischool.org/uploads/1/3/1/4/131437242/7787349.pdf
    • http://files.thesyncre
    • https://cdn.shopify.com/s/files/1/0432/7063/5678/files/ponimutonuvenunetej.pdf
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/36581437271.pdf
    • https://cdn.shopify.com/s/files/1/0427/9376/2975/files/fosuzato.pdf
    • https://cdn.shopify.com/s/files/1/0434/1111/2092/files/38562788746.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/besamanim.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/nogapamokaxew.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/jezewerebotejifenal.pdf
    • https://cdn.shopify.com/s/files/1/0430/8071/2343/files/56829164990.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/5030824322.pdf
    • https://cdn.shopify.com/s/files/1/0428/6975/1967/files/galaforaramudipekej.pdf
    • https://cdn.shopify.com/s/files/1/0437/0294/3899/files/44446517815.pdf
    • https://cdn.shopify.com/s/files/1/0435/5214/5560/files/42597014870.pdf
    • https://cdn.shopify.com/s/files/1/0437/6592/3997/files/83233306553.pdf
    • https://cdn.shopify.com/s/files/1/0433/0668/0484/files/92386778932.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_off00007518.bin
7db6ac05fa2a91eaf3374cea40317d28c9b3bd48c6a2883ff3431d36a2f0215b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7518 5396 bytes
font_01_sfnt_off0000875c.bin
9e0ef9c6a2a5aaae44459f92d2e697b4939966f5f17f7fe48f87d016ff1ee097		 pdf-font-stream PDF embedded font (sfnt) at offset 0x875C 10252 bytes

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