Malicious PDF — malware analysis report

Static analysis result for SHA-256 de42aa5798c22f6d…

MALICIOUS

PDF

39.3 KB Created: 2020-08-23 06:44:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4218904703576391dead5dca50561117 SHA-1: 8ebf87cb182360be65d09ee4b384865ec14e6c65 SHA-256: de42aa5798c22f6d486fcb1cd739b6fcce5ec21a67cb6cc185a3b4b66a1dae07
120 Risk Score

Malware Insights

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

The PDF file contains a link to a redirector URL, which is a common tactic for phishing and malware distribution. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and the 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, likely for SEO manipulation or to host further malicious content. The document body itself contains garbled text but includes the primary malicious URL, suggesting an attempt to disguise the malicious intent with seemingly educational content.

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=chemical+equation+worksheet+types+of+reactions
    • http://senom.peerlesselegance.shop/uploads/1/3/2/7/132740478/tapofumegib-vogabo-beworekug.pdf
    • http://notil.namiow.org/uploads/1/3/1/3/131379578/9069664.pdf
    • https://cdn.shopify.com/s/files/1/0433/7179/0494/files/29475111955.pdf
    • https://cdn.shopify.com/s/files/1/0448/3471/7858/files/before_and_after_magazine.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/70743587462.pdf
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/arm_assembly_language.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/20583249787.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1724/files/film_bioskop_indonesia_terbaru_cinema_21.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/aids_ka_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/3543/3882/files/24606816544.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_off00005bba.bin
ea94be058b57e131c5547c75a931fb07277051688916809bdb1e9ad511853cfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBA 5544 bytes
font_01_sfnt_off00006e84.bin
0608eda0863261fd029bd40aa3449523d80296434d4fbbb20d2bed9a8840f7dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E84 9940 bytes

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