Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd00a1363bdf8f71…

MALICIOUS

PDF

38.4 KB Created: 2020-08-04 10:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2f5a348c1935e077bf22d35b1d75e54 SHA-1: b1ab596d312b0c519ec9a063ba78e822364f8aef SHA-256: cd00a1363bdf8f7187caf7e24a1a2add312093282d199249036e7c06c0a538c6
150 Risk Score

Malware Insights

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

The PDF contains numerous links, with a primary link redirecting to a known malicious domain. The document body text, though heavily obfuscated, contains keywords related to statistical learning and the malicious URL, suggesting a lure. The presence of multiple embedded links, including a redirector, indicates an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

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=introduction+to+statistical+learning+pdf+github
    • http://files.hillcountryyoungmarines.com/uploads/1/3/0/8/130814397/xuletomuta-mabuworum-xawotirizotip-tegomezo.pdf
    • http://files.jeffreyl.com/uploads/1/3/1/1/131164558/821863.pdf
    • http://files.skinboostlab.org/uploads/1/3/1/6/131606094/ruzatodaketiweb.pdf
    • http://files.kathleenflanagan.ca/uploads/1/3/0/7/130776484/cd7a2a4.pdf
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/kogajuboxikupivuvukolo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3925/0853/files/13354381618.pdf
    • https://cdn.shopify.com/s/files/1/0436/3649/0398/files/bukesi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4044/files/78472149325.pdf
    • https://cdn.shopify.com/s/files/1/0432/1312/7835/files/dusozerujokubotasar.pdf
    • https://cdn.shopify.com/s/files/1/0429/2739/0887/files/50384736116.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83260340608.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/33424733601.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/tusonikisod.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/38945466415.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_off0000577d.bin
1877f592b1f9a4d68b1627e4793ec72e5059472d132441da11fb0caf83810bde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x577D 5492 bytes
font_01_sfnt_off00006a1b.bin
a97979a4b5dea93fe5ea347de18b6e0bea5d5966ba5042500f9869893ca102c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1B 10128 bytes

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