Malicious PDF — malware analysis report

Static analysis result for SHA-256 7990093e9b1bfacb…

MALICIOUS

PDF

46.7 KB Created: 2020-08-21 03:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b63f85b04978ceed61645134eb09ac16 SHA-1: d24a0d094daf45ff5e1f875a704af0e3dff8ff06 SHA-256: 7990093e9b1bfacbbc25c747945b6680ae2d64bed103a03855bccf2f8f9e9ef1
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to a game ('Altar of sacrifice poe guide') and the malicious URL. This suggests the PDF is designed to trick users into visiting the redirector, which likely leads to further malicious activity.

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.cc/pify?keyword=altar+of+sacrifice+poe+guide
    • http://files.publichealthmuseum.org/uploads/1/3/1/3/131384789/a826b1b39.pdf
    • http://vatoxuj.algagen.com/uploads/1/3/1/1/131163927/xonibamozoj.pdf
    • http://files.greywolfhowling.com/uploads/1/3/1/6/131606366/4670962.pdf
    • https://cdn.shopify.com/s/files/1/0437/0271/4533/files/19912069883.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/painless_evidence_based_medicine_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/34257733610.pdf
    • https://cdn.shopify.com/s/files/1/0432/6054/3138/files/xobirisoxofijavejuxefu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2081/2441/files/lowes_fairbanks_ak.pdf
    • https://cdn.shopify.com/s/files/1/0428/4927/1975/files/1472809542.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74098669839.pdf
    • https://cdn.shopify.com/s/files/1/0432/8656/0936/files/2013_honda_civic_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/java_programming_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/82281615302.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/hindu_baby_boy_names_book.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/1/0437/0271/4533/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000788c.bin
6ff1f67c9650ecc90be7cc4b1f5cf25a5e011b0a9c20c046e76e30cb329f6b27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x788C 5312 bytes
font_01_sfnt_off00008aa4.bin
d44017d9a1b6df45699ad8c998c11a117060cefb95ed06b11a00ea23fc343dcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA4 10288 bytes

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