Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e5098f21ea5ed3…

MALICIOUS

PDF

44.2 KB Created: 2020-08-20 14:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e659765c09e4fa9d37af9e23034d015 SHA-1: f8012d447939b93a8f57c5a12c37872dc2f6582a SHA-256: b5e5098f21ea5ed3724ff0544cdf19a3044fbc0fd0d0c34e026dffd41bb652dc
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links directs to a known malicious redirector URL, indicating a potential phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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=abhishek+bachchan+movies
    • http://files.makinghairsmile.com/uploads/1/3/2/3/132302749/fesagufu_perudovazezorem.pdf
    • http://files.dollarmovement.com/uploads/1/3/1/6/131636954/gimolamujemedikefut.pdf
    • http://files.volkerspatchcollection.com/uploads/1/3/0/8/130874385/7f7a98327276b1f.pdf
    • http://gofaja.clarkhughesproject.org/uploads/1/3/0/7/130739227/sulaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/psicologia_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0428/8980/5980/files/watertight_doors_on_ships.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/89202586057.pdf
    • https://cdn.shopify.com/s/files/1/0436/1102/9666/files/69301250559.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/xovikob.pdf
    • https://cdn.shopify.com/s/files/1/0431/9140/2660/files/53803002079.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdf
    • https://cdn.shopify.com/s/files/1/0431/8806/0320/files/13932751290.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/52082359212.pdf
    • https://cdn.shopify.com/s/files/1/0434/8506/9478/files/magicseaweed_long_beach_ny.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_off00006fe3.bin
3b6c1a1a310bd5713d9cfa254154ba210c7f08b02024bf292a4ebec657ba045d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE3 5164 bytes
font_01_sfnt_off00008149.bin
0ecf1ff63333f02937c4df27c8de8992ca3b9f038c9cdcce16c751737987634c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8149 10240 bytes

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