Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b40c1b3dcfd1ba…

MALICIOUS

PDF

39.0 KB Created: 2020-08-30 06:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f344c2c5d9522e3efc675bb087c86825 SHA-1: 5a6d0d11407de5cb8cb56f4264208d735ed0c2ff SHA-256: 72b40c1b3dcfd1ba76c067e7cb29a188bc44da3fbfac9196f5de6c016a1d1d96
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by an ML classifier and contains a significant number of embedded links, many pointing to external PDF files. One of the primary links directs to a known malicious redirector infrastructure. The document body contains garbled text but includes the URL 'https://ttraff.com/wix?keyword=clicker+keypad+just+blinks', which is associated with malicious redirector activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=clicker+keypad+just+blinks
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0091/2278/files/perofolexegigobunexazusuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7248/files/nefiwejetexixezixap.pdf
    • https://cdn.shopify.com/s/files/1/0437/6195/9069/files/.pdf_3ece4918-8448-4841-9171-108dfbf7eea6
    • https://cdn.shopify.com/s/files/1/0437/8673/1681/files/kekelewifuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/matam.pdf
    • https://static.usrfiles.com/ugd/b8c837_a32a52964d8f440ab9dfd5f79824a3d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e21ccbca95d4bb39aa29dc03c6e41eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d7cf7449f994085882a662e3ea1e713.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ea82feab48846e2affe08e1fd49485a.pdf
    • https://static.usrfiles.com/ugd/34e21e_27129d8932c8431796cf4fb73eace695.pdf
    • https://static.usrfiles.com/ugd/9e41f0_075f6b15fef14222a1045e2cc9d44ac2.pdf
    • https://static.usrfiles.com/ugd/b8c837_fceb8642e2314bf49b72c69d942b1f56.pdf
    • https://static.usrfiles.com/ugd/9374a7_6ea93185523549d496110c8f29a92e74.pdf
    • https://static.usrfiles.com/ugd/b8c837_16d878a99e694a5d98a201f02f8bfb7a.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/79359309767.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/zakugomixadowojaniduda.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6070/files/mikikisujubiko.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056b9.bin
0f0243e744873640b41f78c3237513fc7c16b8344340afe0743834400c936d08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56B9 5356 bytes
font_01_sfnt_off000068f7.bin
7500aeb270fdb36704eaf22397b701c1ecf647a49427200749bffee2c8ef4255		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F7 10792 bytes

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