Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7132a80227de918…

MALICIOUS

PDF

55.1 KB Created: 2020-08-31 16:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2634ccc214588767c20ea1e315f4dd8 SHA-1: ae7d1a03d62f9eb42c8db57b6b612f0b1c2f1f0f SHA-256: d7132a80227de91810b817a4d35db6f43f723153958d5f87fe9b9610c95cb62d
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains this URL and references to other PDF files hosted on static.usrfiles.com. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to redirect users.

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=hungarian+rhapsody+piano+sheet
    • https://static.usrfiles.com/ugd/b8c837_5be4f193f219455d8047db8ff99135ce.pdf
    • https://static.usrfiles.com/ugd/0cd019_5f5021b3368d4db8a697b7b80328cac4.pdf
    • https://static.usrfiles.com/ugd/3b0c81_f83927bc8e334c6c818920be13b7e05c.pdf
    • https://static.usrfiles.com/ugd/71fd01_62dad75f17ef47508d1a9014471ce48a.pdf
    • https://static.usrfiles.com/ugd/74e905_2832ba387e6945f0bfce50c632de4657.pdf
    • https://cdn.shopify.com/s/files/1/0462/7690/3072/files/properties_of_matter_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/tipilaxipijis.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/xawezozawuxa.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_623d804704a24be29815f498aaeb0f38.pdf
    • https://static.usrfiles.com/ugd/f63f29_98501e1b24f249d79c9331d9eb89a45f.pdf
    • https://static.usrfiles.com/ugd/4aae87_ae0d3d4636ba46e596afc35e48c5bb72.pdf
    • https://static.usrfiles.com/ugd/921909_b5b4d3d285684d18a5770a0ded2994d0.pdf
    • https://static.usrfiles.com/ugd/87fdc7_3738e061e76e4f13949ef269502039f3.pdf
    • https://static.usrfiles.com/ugd/bd5c68_21ab98cd510942978155864ab45cf0cf.pdf
    • https://static.usrfiles.com/ugd/b7306e_c696b307a4b54d2e88d1869166fc8330.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_off000081d6.bin
3fdcff12dbde1cefdb94ae52f2dfa72096abe83ffe6806e94e93a73a0937c826		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81D6 5252 bytes
font_01_sfnt_off000093b7.bin
e8ffc58da650b99789906fc3b0ebf99e70f1d36c8b1bfcdae0d73c5794020ee5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93B7 11252 bytes
font_02_sfnt_off0000ba54.bin
bc8021340700787581c219adb1dcf6c1adce1f67658194a620b0e1546b284d2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA54 16164 bytes

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