Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8609eab66473d4…

MALICIOUS

PDF

41.3 KB Created: 2020-08-14 18:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a47bcaa216d0369c3e3868a32cf908f0 SHA-1: 74af411aae8635bbae9178c6db278f68d0b85cd2 SHA-256: 2f8609eab66473d4ef9bac7423733e8fcedbadab8009259e600818fb7f028316
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and numerous embedded URLs, including a primary redirector at 'https://ttraff.com/pify?keyword=cgaxis+complete+free'. This suggests the document's purpose is to lure users to malicious sites.

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=cgaxis+complete+free
    • http://files.georgiahormones.com/uploads/1/3/1/4/131409463/5daa2f125a.pdf
    • http://files.dfwfamilychurch.com/uploads/1/3/0/8/130814216/6059873.pdf
    • http://files.moneymentorph.com/uploads/1/3/1/6/131606630/nepunad_sozarifanowako_pamuresotevi_bigotijaved.pdf
    • http://files.awesomealgebra.org/uploads/1/3/1/4/131455475/zokabu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/futikuzazojexopuvenewipu.pdf
    • https://cdn.shopify.com/s/files/1/0444/2364/3303/files/48853664895.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/rf_to_eu_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0443/2130/8828/files/android_developer_studio.pdf
    • https://cdn.shopify.com/s/files/1/0431/4320/0929/files/mefig.pdf
    • https://cdn.shopify.com/s/files/1/0434/4381/4560/files/71453010192.pdf
    • https://cdn.shopify.com/s/files/1/0435/7265/8335/files/worksheets_for_kindergarten_math.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cbe.bin
c6a83411b18b8cdf69a80234126329d2caa975f254c1d6c125e03a5167df5cb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CBE 5108 bytes
font_01_sfnt_off00005e2e.bin
d128acec5fdfa32049ae4a74a0509057a46400928255b76de708514641e0c3c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2E 13448 bytes
font_02_sfnt_off000088d5.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D5 4324 bytes

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