Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a1f885083e7886e…

MALICIOUS

PDF

50.4 KB Created: 2020-07-29 18:50:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ec9491cdbcec0dcfc654256c93a906d SHA-1: cbfe88c93b30e90af04835d5f95422454f34fe7f SHA-256: 2a1f885083e7886e3037d88b9082e59471be08bba733ea62c9ec4dceb545a329
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests a large number of outbound links, likely for SEO manipulation or to host further malicious content. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which is likely the first step in a malicious chain.

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=infrastructure+as+code+book+pdf
    • http://files.mountainvilleumc.com/uploads/1/3/0/9/130969862/7928901.pdf
    • http://files.andrewdeckergamedev.com/uploads/1/3/1/3/131380120/feeaaca75c.pdf
    • http://files.pfed.org.pl/uploads/1/3/0/7/130775125/dizawusaxosa.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/wobawefajekiliwirifesuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6554/8705/files/sapefojepularewoxuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6522/1015/files/ritadavisebativ.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/kifoka.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5400/files/roxaribituzivejesosemedo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62856854762.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dedijadexurusefux.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4872/files/55049908146.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1357/files/pupixasi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8941/2767/files/wexatujinam.pdf
    • https://cdn.shopify.com/s/files/1/0430/7333/9559/files/23727705221.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/78663040661.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/
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/kifoka

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008875.bin
0491bff41d7989e8a70e6ff296746547eba6ae8d6d08fc60dcf9060fd99810ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8875 5092 bytes
font_01_sfnt_off000099b3.bin
c7369e971dd2f2c895e52ec7678183395e89ecc0001ffe3e29642342d9a5a68c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99B3 10156 bytes

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