Malicious PDF — malware analysis report

Static analysis result for SHA-256 e72f01bcb4ab5980…

MALICIOUS

PDF

40.8 KB Created: 2020-07-12 00:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f29b5b7e243e747bf8a6cc73d1e575f0 SHA-1: f30b39891bb46230e493e6bd03e4f5e1c6b8a56c SHA-256: e72f01bcb4ab59808eae83b6894f71882179fd9de361c0bb5ddc2b77852dc352
152 Risk Score

Malware Insights

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

The PDF document contains a link farm and a specific malicious redirector URL, disguised as a service manual. The primary malicious link, 'https://ttraff.cc/pify?keyword=agco+allis+1920h+service+manual', is designed to redirect users to further malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded URLs supports a link-farming or redirection-based attack pattern.

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.cc/pify?keyword=agco+allis+1920h+service+manual
    • http://files.uottawabgsa.ca/uploads/1/3/2/6/132682093/351389.pdf
    • http://files.multiculturalassociationsussex.com/uploads/1/3/1/3/131398131/sezasa_pirapor.pdf
    • http://files.saintsandsavagespowerlifting.com/uploads/1/3/1/3/131378835/274c443392.pdf
    • http://files.ericahyatt.com/uploads/1/3/1/3/131382141/1525d.pdf
    • http://files.oatfieldfarmandstables.com/uploads/1/3/2/6/132695361/0123a77dfe18.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/gujatuju.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98048873934.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/32047113054.pdf
    • https://totoxemumera.files.wordpress.com/2020/07/siramuxinopubokid.pdf
    • https://denorawe.files.wordpress.com/2020/06/50980776468.pdf
    • https://migoxuwo.files.wordpress.com/2020/06/segegawupijumazujigika.pdf
    • https://dalizid271947526.files.wordpress.com/2020/07/niraxawunudok.pdf
    • https://gofiteturape494264367.files.wordpress.com/2020/07/xawodabexavivitevowevube.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/simevenalunixesasosorapaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/tepobudataka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/64107256897.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/53788135860.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/pudoxuxofaxugugude.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/sefexafewebifuzupu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50398535586.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/27751836422.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/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50398535

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054a5.bin
0e5139053b6f2670a3d6a40a38259015b13072dea7ef705e553e0579418e8fe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54A5 3520 bytes
font_01_sfnt_off00006103.bin
d69a4edb73e36325b1f872e4b5db1a052c5ac67fee3a2cfbcbdad9fc726e0f3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6103 5544 bytes
font_02_sfnt_off000073ab.bin
56df746317a0a1840bfe44b9f9f7fd2a0894a0c77b2b701983c94963146e4387		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73AB 9912 bytes

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