Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaa5f6926b36fc65…

MALICIOUS

PDF

80.1 KB Authoring application: Smallpdf Desktop
MD5: 11393d0c87ad42b94c5c2c8e921a9172 SHA-1: 3f0f74832dc4fc27d9dd35a01029fa305fe31a7d SHA-256: aaa5f6926b36fc6520e52d34c40b86be9d516b85fea23f4612f2c872209b8b16
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF_SEO_LINK_FARM heuristic fired, revealing a large number of embedded external links pointing to other PDF files hosted on various domains. This suggests the document is part of a link farm or SEO poisoning campaign, or is used to distribute further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://gedofudus.copyrightcontact-10000671253681.com/uploads/2020/01/28/vinulibiv.pdf
    • http://jasminenjuniper.com/uploads/1/3/0/3/130323535/demagebelasivoloz.pdf
    • http://storeshop.xyz/uploads/2020/01/27/7316833.pdf
    • http://frebuilds.com/uploads/1/3/0/4/130435598/baxoj.pdf
    • http://mybulletproofart.com/uploads/1/3/0/3/130323199/nedudakujev-bojexizogi-jakafinife.pdf
    • http://derugatasu.gruzavi.ru/uploads/2020/01/28/tawaw_binub_nozir_tigovit.pdf
    • http://serbaballet.com/uploads/1/3/0/6/130620427/rikiletiv_diremanutosit_regapufuvozap_kuxiwiso.pdf
    • http://equipsale.ru/uploads/2020/01/27/88e8b19ed5b102a.pdf
    • http://may-som.com/uploads/1/3/0/6/130620441/a13f1.pdf
    • http://healthfullyyoursnutrition.com/uploads/1/3/0/5/130547116/c11e7.pdf
    • https://mejupavawojuf.weebly.com/uploads/1/3/0/3/130313356/pinuku-lijarugovijis.pdf
    • http://lemowikabo.gbpfinancials.com/uploads/2020/01/27/xuzavosejojepunazi.pdf
    • http://ssl-test-nic-2.ru/uploads/2020/01/29/562968b701.pdf
    • https://kipalunixevoloz.weebly.com/uploads/1/3/0/5/130542718/fafobisanipu.pdf
    • http://suzeva.mywaycreative.art/uploads/2020/01/28/9171044.pdf
    • http://gisum.tatvideon.ru/uploads/2020/01/28/b4f8b7f.pdf
    • http://damianperezescribano.com/uploads/2020/01/29/pasavizo.pdf
    • https://zibufapirusataw.weebly.com/uploads/1/3/0/2/130270882/damonok-soxatekalazet.pdf
    • https://jegejifajexezi.weebly.com/uploads/1/3/0/4/130477490/3894842.pdf
    • http://pack359bsa.org/uploads/1/3/0/2/130270900/130270900.html#telugu+action+movies+2018+free
    • https://zibufapirusataw.weebly.com/uploads/1/3/0/2/130270882/d

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001709.bin
54a45ec736f5767eabea8b912ebc9dc128df7ae4ef0d94a7a6423ebb5827d410		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1709 9792 bytes
font_01_sfnt_off0000692f.bin
538af48f2360cc6f97f08c779af40d9eb75a1e66b23ff4fd5097b84c27b39dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x692F 16200 bytes

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