Malicious PDF — malware analysis report

Static analysis result for SHA-256 53111510c6605d98…

MALICIOUS

PDF

44.8 KB Created: 2020-08-01 12:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ea2a19cd5422f9c44f20dfd259b11f1 SHA-1: c665c0669ceee4e1633d4d3fbd1b75620bbd47e6 SHA-256: 53111510c6605d98573dd039b715cf8ce7f6c3ea3cb898a6588b583f9d6a42ce
120 Risk Score

Malware Insights

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

The PDF document was identified as malicious due to its inclusion of a link to a known malicious redirector, ttraff.com. The document body, though heavily obfuscated, contains text related to 'free math books pdf' and the URL that triggered the malicious redirector heuristic. This suggests a social engineering lure to entice users to click the malicious link, likely leading to further malware delivery or phishing attempts.

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=free+math+books+pdf
    • http://files.owensphotography.org/uploads/1/3/1/3/131380992/4846208.pdf
    • http://files.culhamafterschool.com/uploads/1/3/0/9/130969357/7625555.pdf
    • http://files.southernnewenglandseacadets.org/uploads/1/3/0/8/130874204/seguleme.pdf
    • http://files.newmanslibrary.com/uploads/1/3/1/4/131407695/165b92eac91d2.pdf
    • http://files.leabarrymire.com/uploads/1/3/1/3/131379439/3946488.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/30518730821.pdf
    • https://cdn.shopify.com/s/files/1/0428/7011/2423/files/17993059219.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/1454155809.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/mulavuvitavowara.pdf
    • https://cdn.shopify.com/s/files/1/0435/8946/8328/files/loritugaveposegexudel.pdf
    • https://cdn.shopify.com/s/files/1/0441/3951/1960/files/vutasafonepatalolijelul.pdf
    • https://cdn.shopify.com/s/files/1/0440/8947/5237/files/zovebo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2872/5405/files/74653089460.pdf
    • https://cdn.shopify.com/s/files/1/0434/3290/2806/files/temigezisila.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/52553042522.pdf
    • https://cdn.shopify.com/s/files/1/0428/9839/1196/files/mejolelidejazuvogab.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_off000070af.bin
2560ce611c5d07fc90cd2da525b39d122184be8157759f6916f9a0617017cced		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70AF 5408 bytes
font_01_sfnt_off000082dc.bin
77edd0d71242220f0df42ffd0266b5256db12cbfc09218c260989f20b3f4dad3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82DC 10444 bytes

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