Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b7c2a30a26b9cc5…

MALICIOUS

PDF

35.2 KB Created: 2020-08-11 12:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b06af4bc77bf9a3f2ef2ddfabcf72acf SHA-1: c416b69fbc59f09fce94f806f087aa8489d2b647 SHA-256: 4b7c2a30a26b9cc5174ba452ce4700598d9a3bb165c0f913889a7bb2fe5d60fd
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though partially corrupted, contains text related to a 'Beckett football card price guide pdf' and includes the malicious URL, suggesting a lure. The presence of a link farm heuristic further indicates malicious intent to drive traffic to external sites. The ML classifier strongly supports the malicious verdict.

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=beckett+football+card+price+guide+pdf
    • http://files.rachelkoren.com/uploads/1/3/1/3/131383318/cababd6d630.pdf
    • http://files.madaboutlabs.com/uploads/1/3/2/7/132710563/7844858.pdf
    • http://files.grayinghockey.com/uploads/1/3/1/6/131637016/jusifitowafufi_dizonodizajujuw_fisujil_veduzonajumumax.pdf
    • http://sarexewe.healthyfoundations.co/uploads/1/3/0/7/130775934/fatiwusunosefadarit.pdf
    • http://files.balletwithmissrachel.com/uploads/1/3/0/9/130969573/856c84bf1ac3622.pdf
    • https://cdn.shopify.com/s/files/1/0433/0877/7637/files/fuzolevoge.pdf
    • https://cdn.shopify.com/s/files/1/0436/0513/1421/files/charlotte_danielson_rubric.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6596/files/nezilulebevufukow.pdf
    • https://cdn.shopify.com/s/files/1/0436/4576/3744/files/fifirosezuwifel.pdf
    • https://cdn.shopify.com/s/files/1/0434/6416/3490/files/56025133283.pdf
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/bible_ya_sepedi_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2902/files/vegukapin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9111/6700/files/62242068039.pdf
    • https://cdn.shopify.com/s/files/1/0438/5194/0000/files/xokatesu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5319/4133/files/i_751_affidavit_sample.pdf
    • https://cdn.shopify.com/s/files/1/0436/2836/3939/files/fupupijuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1735/files/28595013392.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_off00004b5e.bin
a04fa83df1c4aab64cfba84a93d157987aae984eb193a7bc4be2e491131d432b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B5E 5400 bytes
font_01_sfnt_off00005dc3.bin
1fd3c760cadc8bc2f6a1087c0a7778a4c99f1bf73ca8071807249eab716f26ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC3 9928 bytes